@ApiStatus.Internal
  public void executeChangeCaseSensitivity(@NotNull VirtualFile file, @NotNull FileAttributes.CaseSensitivity newCaseSensitivity) {
    VirtualDirectoryImpl directory = (VirtualDirectoryImpl)file;
    setFlag(directory, Flags.CHILDREN_CASE_SENSITIVE, newCaseSensitivity == FileAttributes.CaseSensitivity.SENSITIVE);
    setFlag(directory, Flags.CHILDREN_CASE_SENSITIVITY_CACHED, true);
    directory.setCaseSensitivityFlag(newCaseSensitivity);
  }
@ApiStatus.Internal
  public void executeChangeCaseSensitivity(@NotNull VirtualFile file, @NotNull FileAttributes.CaseSensitivity newCaseSensitivity)