private static @Nullable ASTNode findRelevantCommentNode(@NotNull ASTNode fileNode) {
    ASTNode node = fileNode.findChildByType(JavaElementType.PACKAGE_STATEMENT);
    if (node == null) node = fileNode.getLastChildNode();
    while (node != null && node.getElementType() != JavaDocElementType.DOC_COMMENT) {
      node = node.getTreePrev();
    }
    return node;
  }
private static @Nullable ASTNode findRelevantCommentNode(@NotNull ASTNode fileNode)