parameters: (self, na_rep="NaT", date_format=None)
docstring: Helper method for astype when converting to strings.
  
          Returns
          -------
          ndarray[str]
docstring_summary: Helper method for astype when converting to strings.
docstring_tokens: Helper method for astype when converting to strings .
function: def _format_native_types(self, na_rep="NaT", date_format=None):
          """
          Helper method for astype when converting to strings.
  
          Returns
          -------
          ndarray[str]
          """
          raise AbstractMethodError(self)
function_tokens: def _format_native_types ( self , na_rep = "NaT" , date_format = None ) : raise AbstractMethodError ( self )