stretchr/objx

package objx

// Has gets whether there is something at the specified selector
// or not.
//
// If m is nil, Has will always return false.
func (m Map) Has(selector string) bool {
    if m == nil {
        return false
    }
    return !m.Get(selector).IsNil()
}

// IsNil gets whether the data is nil or not.
func (v *Value) IsNil() bool {
    return v == nil || v.data == nil
}