AL</code>
        <p>
          A fatal error, which prevents performing the refactoring. For example
          the name of a local variable being extracted is not a valid
          identifier, or selection is not a valid expression.
        </p>
      </value>
    </enum>
  </type>
  <type name="RemoveContentOverlay">
    <p>
      A directive to remove an existing file content overlay. After processing
      this directive, the file contents will once again be read from the file
      system.
    </p>
   