public static Type GetPredicateExpressionParameter(Type expressionType)
{
var expressionImplementationType = CsUtility.GetUnderlyingGenericType(expressionType, typeof(Expression <>));
if (expressionImplementationType == null)
{
return(null);
}
var funcType = expressionImplementationType.GetGenericArguments().First();
return(GetPredicateFunctionParameter(funcType));
}