NewFieldInvalidValue returns a ValidationError indicating "invalid value".

NewFieldInvalidValueWithReason returns a ValidationError indicating "invalid value" and a reason for the error.

NewFieldRequired returns a *ValidationError indicating "value required".

ValidateConfig returns a list of error from validation.

ErrorInvalidValue is used to report values that do not conform to the expected schema.

ErrorTypeRequired is used to report required values that are not provided (e.g.

Error is an implementation of the 'error' interface, which represents an error of validation.

ErrorType is a machine readable value providing more detail about why a field is invalid.