src/vs/code/electron-sandbox/issue/issueReporterMain.ts/IssueReporter/validateInputs
class IssueReporter:	private validateInputs(): boolean {
		let isValid = true;
		['issue-title', 'description', 'issue-source'].forEach(elementId => {
			isValid = this.validateInput(elementId) && isValid;
		});

		if (this.issueReporterModel.fileOnExtension()) {
			isValid = this.validateInput('extension-selector') && isValid;
		}

		return isValid;
	}