. For
          suggestions of this kind, the completion is the named argument
          identifier including a trailing ':' and a space.
        </p>
      </value>
      <value><code>OPTIONAL_ARGUMENT</code></value>
      <value>
        <code>OVERRIDE</code>
        <p>
          An overriding implementation of a class member is being suggested.
        </p>
      </value>
      <value><code>PARAMETER</code></value>
      <value>
        <code>PACKAGE_NAME</code>
        <p>The name of a pub package is b