code: def conf(self):
          
          if not hasattr(self, "_conf"):
              self._conf = RuntimeConfig(self._jsparkSession.conf())
          return self._conf
docs: Runtime configuration interface for Spark.
  
          This is the interface through which the user can get and set all Spark and Hadoop
          configurations that are relevant to Spark SQL. When getting the value of a config,
          this defaults to the value set in the underlying :class:`SparkContext`, if any.