public <R, C> R accept(StatementVisitor<R, C> visitor, C context) {
    return visitor.visitNode(this, context);
  }
Accessible for {@link StatementVisitor}, use {@link StatementVisitor#process(StatementNode,
Object)} instead.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/statement/StatementNode.java