public <T> void addExplicitExtension(@NotNull FileTypeExtension<T> instance, @NotNull FileType fileType, @NotNull T object) {
    instance.addExplicitExtension(fileType, object, myParentDisposable);
  }
public <T> void addExplicitExtension(@NotNull FileTypeExtension<T> instance, @NotNull FileType fileType, @NotNull T object)