code: @JSFProperty(partialStateHolder=true)
      public Converter getConverter()
      {
          if (_converter != null)
          {
              return _converter;
          }
          ValueExpression expression = getValueExpression("converter");
          if (expression != null)
          {
              return (Converter) expression.getValue(getFacesContext().getELContext());
          }
          return null;
      }
docs: An expression that specifies the Converter for this component.
  <p>
  The value can either be a static value (ID) or an EL expression. When a static id is
  specified, an instance of the converter type registered with that id is used. When this
  is an EL expression, the result of evaluating the expression must be an object that
  implements the Converter interface.
  </p>