pub type GDExtensionInterfaceClassdbRegisterExtensionClassIntegerConstant = unsafe extern "C" fn(p_library: GDExtensionClassLibraryPtr, p_class_name: GDExtensionConstStringNamePtr, p_enum_name: GDExtensionConstStringNamePtr, p_constant_name: GDExtensionConstStringNamePtr, p_constant_value: GDExtensionInt, p_is_bitfield: GDExtensionBool);