GDTEST_OK
~~ WARNING at line 3: (UNUSED_PRIVATE_CLASS_VARIABLE) The class variable "_a" is declared but never used in the class.
~~ WARNING at line 7: (UNUSED_PRIVATE_CLASS_VARIABLE) The class variable "_d" is declared but never used in the class.
GDTEST_OK
~~ WARNING at line 3: (UNUSED_PRIVATE_CLASS_VARIABLE) The class variable "_a" is declared but never used in the class.
~~ WARNING at line 7: (UNUSED_PRIVATE_CLASS_VARIABLE) The class variable "_d" is declared but never used in the class.