public virtual WebFilter <TEntity> Parse <TEntity>(string key, string value)
{
var parts = (value ?? "").Split(',').ToList();
var operand = ExtractFilterOperand(parts);
var chain = _expressionParser.ParseChain <TEntity>(key);
var values = ConvertFilterValues(operand, chain, parts);
return(new WebFilter <TEntity>(chain, operand, values));
}