/// Finds movies and trailers similar to a given trailer.
/// </summary>
/// <param name="userId">The user id.</param>
/// <param name="maxOfficialRating">Optional filter by maximum official rating (PG, PG-13, TV-MA, etc).</param>
/// <param name="hasThemeSong">Optional filter by items with theme songs.</param>
/// <param name="hasThemeVideo">Optional filter by items with theme videos.</param>
/// <param name="hasSubtitles">Optional filter by items with subtitles.</param>
/// <param name="hasSpecialFeature">Optional filter by items with special features.</param>
/// <param name="hasTrailer">Optional filter by items with trailers.</param>
/// <param name="adjacentTo">Optional. Return items that are siblings of a supplied item.</param>
/// <param name="parentIndexNumber">Optional filter by parent index number.</param>
/// <param name="hasParentalRating">Optional filter by items that have or do not have a parental rating.</param>
/// <param name="isHd">Optional filter by items that are HD or not.</param>
/// <param name="is4K">Optional filter by items that are 4K or not.</param>
/// <param name="locationTypes">Optional. If specified, results will be filtered based on LocationType. This allows multiple, comma delimeted.</param>
/// <param name="excludeLocationTypes">Optional. If specified, results will be filtered based on the LocationType. This allows multiple, comma delimeted.</param>
/// <param name="isMissing">Optional filter by items that are missing episodes or not.</param>
/// <param name="isUnaired">Optional filter by items that are unaired episodes or not.</param>
/// <param name="minCommunityRating">Optional filter by minimum community rating.</param>
/// <param name="minCriticRating">Optional filter by minimum critic rating.</param>
/// <param name="minPremiereDate">Optional. The minimum premiere date. Format = ISO.</param>
/// <param name="minDateLastSaved">Optional. The minimum last saved date. Format = ISO.</param>
/// <param name="minDateLastSavedForUser">Optional. The minimum last saved date for the current user. Format = ISO.</param>
/// <param name="maxPremiereDate">Optional. The maximum premiere date. Format = ISO.</param>
/// <param name="hasOverview">Optional filter by items that have an overview or not.</param>
/// <param name="hasImdbId">Optional filter by items that have an imdb id or not.</param>
/// <param name="hasTmdbId">Optional filter by items that have a tmdb id or not.</param>
/// <param name="hasTvdbId">Optional filter by items that have a tvdb id or not.</param>
/// <param name="excludeItemIds">Optional. If specified, results will be filtered by exxcluding item ids. This allows multiple, comma delimeted.</param>
/// <param name="startIndex">Optional. The record index to start at. All items with a lower index will be dropped from the results.</param>
/// <param name="limit">Optional. The maximum number of records to return.</param>
/// <param name="recursive">When searching within folders, this determines whether or not the search will be recursive. true/false.</param>
/// <param name="searchTerm">Optional. Filter based on a search term.</param>
/// <param name="sortOrder">Sort Order - Ascending,Descending.</param>
/// <param name="parentId">Specify this to localize the search to a specific item or folder. Omit to use the root.</param>
/// <param name="fields">Optional. Specify additional fields of information to return in the output. This allows multiple, comma delimeted. Options: Budget, Chapters, DateCreated, Genres, HomePageUrl, IndexOptions, MediaStreams, Overview, ParentId, Path, People, ProviderIds, PrimaryImageAspectRatio, Revenue, SortName, Studios, Taglines.</param>
/// <param name="excludeItemTypes">Optional. If specified, results will be filtered based on item type. This allows multiple, comma delimeted.</param>
/// <param name="isFavorite">Optional filter by items that are marked as favorite, or not.</param>
/// <param name="mediaTypes">Optional filter by MediaType. Allows multiple, comma delimited.</param>
/// <param name="imageTypes">Optional. If specified, results will be filtered based on those containing image types. This allows multiple, comma delimited.</param>
/// <param name="sortBy">Optional. Specify one or more sort orders, comma delimeted. Options: Album, AlbumArtist, Artist, Budget, CommunityRating, CriticRating, DateCreated, DatePlayed, PlayCount, PremiereDate, ProductionYear, SortName, Random, Revenue, Runtime.</param>
/// <param name="isPlayed">Optional filter by items that are played, or not.</param>
/// <param name="genres">Optional. If specified, results will be filtered based on genre. This allows multiple, pipe delimeted.</param>
/// <param name="officialRatings">Optional. If specified, results will be filtered based on OfficialRating. This allows multiple, pipe delimeted.</param>
/// <param name="tags">Optional. If specified, results will be filtered based on tag. This allows multiple, pipe delimeted.</param>
/// <param name="years">Optional. If specified, results will be filtered based on production year. This allows multiple, comma delimeted.</param>
/// <param name="enableUserData">Optional, include user data.</param>
/// <param name="imageTypeLimit">Optional, the max number of images to return, per image type.</param>
/// <param name="enableImageTypes">Optional. The image types to include in the output.</param>
/// <param name="person">Optional. If specified, results will be filtered to include only those containing the specified person.</param>
/// <param name="personIds">Optional. If specified, results will be filtered to include only those containing the specified person id.</param>
/// <param name="personTypes">Optional. If specified, along with Person, results will be filtered to include only those containing the specified person and PersonType. Allows multiple, comma-delimited.</param>
/// <param name="studios">Optional. If specified, results will be filtered based on studio. This allows multiple, pipe delimeted.</param>
/// <param name="artists">Optional. If specified, results will be filtered based on artists. This allows multiple, pipe delimeted.</param>
/// <param name="excludeArtistIds">Optional. If specified, results will be filtered based on artist id. This allows multiple, pipe delimeted.</param>
/// <param name="artistIds">Optional. If specified, results will be filtered to include only those containing the specified artist id.</param>
/// <param name="albumArtistIds">Optional. If specified, results will be filtered to include only those containing the specified album artist id.</param>
/// <param name="contributingArtistIds">Optional. If specified, results will be filtered to include only those containing the specified contributing artist id.</param>
/// <param name="albums">Optional. If specified, results will be filtered based on album. This allows multiple, pipe delimeted.</param>
/// <param name="albumIds">Optional. If specified, results will be filtered based on album id. This allows multiple, pipe delimeted.</param>
/// <param name="ids">Optional. If specific items are needed, specify a list of item id's to retrieve. This allows multiple, comma delimited.</param>