https://iceberg.incubator.apache.org/javadoc/1.7.1/org/apache/spark/sql/catalyst/parser/extensions/IcebergSqlExtensionsParser.WriteOrderingSpecContext.html
IcebergSqlExtensionsParser.WriteOrderingSpecContext
declaration: package: org.apache.spark.sql.catalyst.parser.extensions, class: IcebergSqlExtensionsParser, class: WriteOrderingSpecContext