def METHOD_NAME(self, bdf_file, size=8, is_double=False, element_id=None):
    types = self._get_types(nlimit=True)
    if types:
        bdf_file.write('$ELEMENTS_MASS\n')
    for elems in types:
        #print("MASS", elems.type)
        elems.METHOD_NAME(bdf_file, size=size, element_id=element_id)