class_docstr: JDBC connection options.
code: def get_user_name(self) -> str:
      return self._j_jdbc_connection_options.getUsername()
  
imports: from pyflink.common.typeinfo import RowTypeInfo
  from pyflink.datastream.functions import SinkFunction
  from pyflink.java_gateway import get_gateway
  from pyflink.util.java_utils import to_jarray
label_desc: Use image node_id 4 for calling the JdbcConnectionOptions obj's underlying member method code with example usage: obj.get_user_name() and returns: self