protected bool AttachExpressionBindingHandler <AttrT>(Style style, PDFStyleKey <AttrT> key, string value, StyleValueConvertor <AttrT> convert)
{
StyleValueExpression <AttrT> expression = new StyleValueExpression <AttrT>(key, value, convert);
style.DataBinding += expression.BindValue;
if (style.IsValueDefined(key))
{
style.RemoveValue(key);
}
style.AddValue(expression);
return(true);
}