Avoid using classes from the configured package hierarchy outside of the package hierarchy,
except when using one of the configured allowed classes. Example:
<pre>
package some.package;

import some.other.package.subpackage.subsubpackage.DontUseThisClass;

public class Bar {
   DontUseThisClass boo = new DontUseThisClass();
}
</pre>

<p>
  This rule is deprecated, use {rule:squid:ArchitecturalConstraint} instead.
</p>