library/core/src/main/java/com/google/android/exoplayer2/source/ConcatenatingMediaSource.java
public final synchronized void addMediaSources(Collection<MediaSource> mediaSources) {
    addPublicMediaSources(
        mediaSourcesPublic.size(),
        mediaSources,
        /* handler= */ null,
        /* onCompletionAction= */ null);
  }
/**
   * Appends multiple {@link MediaSource}s to the playlist.
   *
   * @param mediaSources A collection of {@link MediaSource}s to be added to the list. The media
   *     sources are added in the order in which they appear in this collection.
   */
Appends multiple  MediaSources to the playlist.
@param mediaSources A collection of  MediaSources to be added to the list. The media
sources are added in the order in which they appear in this collection.
Appends multiple MediaSources to the playlist . @param mediaSources A collection of MediaSources to be added to the list . The media sources are added in the order in which they appear in this collection .
public final synchronized void addMediaSources(Collection<MediaSource> mediaSources) {
    addPublicMediaSources(
        mediaSourcesPublic.size(),
        mediaSources,
        /* handler= */ null,
        /* onCompletionAction= */ null);
  }
public final synchronized void addMediaSources ( Collection < MediaSource > mediaSources ) { addPublicMediaSources ( mediaSourcesPublic . size ( ) , mediaSources , /* handler= */ null , /* onCompletionAction= */ null ) ; }
Appends multiple {@link MediaSource}s to the playlist.
Appends multiple { @link MediaSource } s to the playlist .