src/main/java/org/eiichiro/bootleg/Types.java
public static boolean isBuiltinType(Type type) {
		Class<?> rawType = getRawType(type);
		return (rawType == null) ? false : builtins.contains(rawType);
	}
public static boolean isBuiltinType(Type type) {
		Class<?> rawType = getRawType(type);
		return (rawType == null) ? false : builtins.contains(rawType);
	}
Returns <code>true</code> if the specified <code>type</code> is a
built-in type.

@param type The type to be tested.
@return <code>true</code> if the specified <code>type</code> is a
built-in type.