ValidationMarker (linkki Utilities 2.3.10 API)

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
```
@FunctionalInterface
public interface ValidationMarker
```
Interface for validation message markers.

Field Summary

Fields
Modifier and Type Field Description

static ValidationMarker REQUIRED
Marks a mandatory field and returns true for isRequiredInformationMissing().

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`boolean`	`isRequiredInformationMissing()`	Returns `true` if the marker marks a validation for a mandatory field.

- Field Detail
  - REQUIRED
```
@NonNull
static final ValidationMarker REQUIRED
```
    Marks a mandatory field and returns true for isRequiredInformationMissing().
- Method Detail
  - isRequiredInformationMissing
```
boolean isRequiredInformationMissing()
```
    Returns true if the marker marks a validation for a mandatory field.