MustMarshal is similar to Marshal, but panics if found error.

MustMarshalIndent is similar to MarshalIndent, but panics if found error.

MustUnmarshal is similar to Unmarshal, but panics if found error.

ShouldMarshal is similar to Marshal, but never return error.

ShouldMarshalIndent is similar to MarshalIndent, but never return error.

ShouldUnmarshal is similar to Unmarshal, but never return error.