/// <summary>
/// Fetch Type Declaration, and tests if it's equal or derived from a specific TypeNode
/// Fails if declaration is not of a Type
/// </summary>
public TypeNode FetchType(String name, System.Type expected)
{
TypeNode type = FetchType(name);
if (type == null || !type.ISA(expected))
{
throw new InvalidIdentifier("Invalid type '" + type + "'. Required '" + expected + "'");
}
return(type);
}