code: def create_function_f_y(self):
          
          return ca.Function(
              'y',
              [self.t, self.x, self.m, self.p, self.c, self.ng, self.nu],
              [self.y_rhs],
              ['t', 'x', 'm', 'p', 'c', 'ng', 'nu'], ['y'], self.func_opt)
docs: output function