validate method
      
void
validate([ 
    
- ValidationMode validationMode = ValidationMode.strictRFC4122,
- bool noDashes = false
validate() validates the internal string representation of the uuid.
Optionally, you can provide a validationMode to use when validating
the uuid string.
Throws FormatException if the UUID is invalid.
Implementation
void validate(
    [ValidationMode validationMode = ValidationMode.strictRFC4122,
    bool noDashes = false]) {
  UuidValidation.isValidOrThrow(
      fromString: uuid, validationMode: validationMode, noDashes: noDashes);
}