code: func (v *Validator) LessOrEqual(field string, value float64) *ValidationResult {
  	return v.inequality(field, value, lessOrEqual, "less than or equal to")
  }
docs: // LessOrEqual will add an error to the Validator if the first
  // element of data.Values[field] is not less than or equal to value or if
  // the first element of data.Values[field] cannot be converted to a number.