public final boolean isCustomRegionStart(@NotNull ASTNode node) {
    if (isCustomFoldingCandidate(node)) {
      String nodeText = node.getText();
      CustomFoldingProvider defaultProvider = getDefaultProvider(nodeText);
      return defaultProvider != null && defaultProvider.isCustomRegionStart(nodeText);
    }
    return false;
  }
public final boolean isCustomRegionStart(@NotNull ASTNode node)