Method GetPrevious

src/GCodes/GCodeMachineState.h:224–224

	inline void AdvanceState() noexcept { state = static_cast<GCodeState>(static_cast<uint8_t>(state) + 1); }

	GCodeMachineState *_ecv_null GetPrevious() const noexcept { return previous; }

	GCodeMachineState *Pop() const noexcept;
	uint16_t GetBlockNesting() const noexcept { return blockNesting; }