package com.typesafe.config;

import java.lang.annotation.Documented;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;

@Documented
@Retention(RetentionPolicy.RUNTIME)
public @interface Nullable {

}

package com.typesafe.config;

import java.lang.annotation.Documented;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;

/**
 * Allows an config property to be {@code null}.
 */
@Documented
@Retention(RetentionPolicy.RUNTIME)
public @interface Nullable {

}

Add a Javadoc comment to the Nullable annotation class.