/**
  * Set the {@link ValueExpression} used to calculate the value for the specified attribute if any.
  *
  * @param name Name of the attribute for which to set a {@link ValueExpression}
  * @param expression The {@link ValueExpression} to set, or <code>null</code> to remove any
  *     currently set {@link ValueExpression}
  * @exception NullPointerException if <code>name</code> is <code>null</code>
  * @exception IllegalArgumentException if <code>name</code> is not a valid attribute of this
  *     converter
  */
 public void setValueExpression(String name, ValueExpression expression) {
   ValidatorUtils.setValueExpression(_facesBean, name, expression);
 }