public void CustomFunctionTwoArgTest()
{
Func <string, string, object> split = (s1, c) => s1.Split(c[0]);
var functions = new Dictionary <string, CustomFunction>
{
["split"] = CustomFunction.Create(split)
};
RunTest(expected: new [] { "ab", "cd" }, query: "split('ab|cd', '|')", customFunctions: functions);
}