iables should be
          camel case and start with a lower case letter. Staring the name of a
          variable with an upper case is OK from the language point of view, but
          it is nice to warn the user.
        </p>
      </value>
      <value>
        <code>ERROR</code>
        <p>
          The refactoring technically can be performed, but there is a logical
          problem. For example the name of a local variable being extracted
          conflicts with another name in the scope, or dupli