code: def get(self, key, default=_NoValue):
          
          self._checkType(key, "key")
          if default is _NoValue:
              return self._jconf.get(key)
          else:
              if default is not None:
                  self._checkType(default, "default")
              return self._jconf.get(key, default)
docs: Returns the value of Spark runtime configuration property for the given key,
          assuming it is set.