# Retrieves the `Bool` value corresponding to the given key
	# Returns the `def_value` if none or if it's the wrong value type
	fun bool(key: String, def_value: Bool): Bool
	do
		sys.jni_env.push_local_frame(1)
		var return_value =
			native_bundle.get_boolean_with_def_value(key.to_java_string, def_value)
		sys.jni_env.pop_local_frame
		return return_value
	end