src/vs/workbench/contrib/terminal/browser/terminalFindWidget.ts/TerminalFindWidget/findFirst
class TerminalFindWidget:	findFirst() {
		const instance = this._terminalService.activeInstance;
		if (instance) {
			if (instance.hasSelection()) {
				instance.clearSelection();
			}
			instance.xterm?.findPrevious(this.inputValue, { regex: this._getRegexValue(), wholeWord: this._getWholeWordValue(), caseSensitive: this._getCaseSensitiveValue() });
		}
	}