Method push

src/scintillaeditview.cpp:4168–4175

	intptr_t levelStack[MAX_FOLD_COLLAPSE_LEVEL]{};

	void push(intptr_t level)
	{
		while (levelCount != 0 && level <= levelStack[levelCount - 1])
		{
			--levelCount;
		}
		levelStack[levelCount++] = level;
	}
};

bool ScintillaEditView::isFolded(size_t line)