def output_type(self):
    struct_dtype = self.arg.type()
    value_dtype = struct_dtype[self.field]
    return rlz.shape_like(self.arg, value_dtype)
def output_type(self):
    struct_dtype = self.arg.type()
    value_dtype = struct_dtype[self.field]
    return rlz.shape_like(self.arg, value_dtype)