title: IntelliJ does't have @NotBlank
body: <p>So im running my program and I need to setup <code>@NotNull</code> from <code>import javaz.validation.constraints.NotBlank;</code>
  All there is</p>
  <pre><code> @NonNull
      private final String firstName;
  </code></pre>
  <p>and <code>import org.springframework.lang.NonNull;</code></p>
  <p>How do I install <strong>@NotNull</strong> or is <strong>@NonNull</strong> the same thing?</p>