code: @Override
  	public String getSimpleName() {
  		if (qualifiedName == null)
  			return "[unknown]";
  		int idx = qualifiedName.lastIndexOf('.');
  		int dollar = qualifiedName.lastIndexOf('$');
  		int max = Math.max(idx, dollar);
  		if (max != -1 && max < qualifiedName.length() - 1) {
  			return qualifiedName.substring(max + 1);
  		}
  		return qualifiedName;
  	}
docs: The simple name of a {@link org.eclipse.xtext.common.types.JvmUnknownTypeReference JvmUnknownTypeReference}
  is always "<code>[unknown]</code>".