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