code: def fillna(self, value):
          
  
          with cython_context():
              return SArray(_proxy = self.__proxy__.fill_missing_values(value))
docs: Create new SArray with all missing values (None or NaN) filled in
          with the given value.
  
          The size of the new SArray will be the same as the original SArray. If
          the given value is not the same type as the values in the SArray,
          `fillna` will attempt to convert the value to the original SArray's
          type. If this fails, an error will be raised.
  
          Parameters
          ----------
          value : type convertible to SArray's type
              The value used to replace all missing values
  
          Returns
          -------
          out : SArray
              A new SArray with all missing values filled