src/vs/workbench/services/keybinding/common/macLinuxKeyboardMapper.ts/ScanCodeCombo/getProducedCharCode
class ScanCodeCombo:	private getProducedCharCode(mapping: IMacLinuxKeyMapping): string {
		if (!mapping) {
			return '';
		}
		if (this.ctrlKey && this.shiftKey && this.altKey) {
			return mapping.withShiftAltGr;
		}
		if (this.ctrlKey && this.altKey) {
			return mapping.withAltGr;
		}
		if (this.shiftKey) {
			return mapping.withShift;
		}
		return mapping.value;
	}