src/vs/editor/contrib/wordHighlighter/wordHighlighter.ts/TriggerWordHighlightAction/constructor
class TriggerWordHighlightAction:	constructor() {
		super({
			id: 'editor.action.wordHighlight.trigger',
			label: nls.localize('wordHighlight.trigger.label', "Trigger Symbol Highlight"),
			alias: 'Trigger Symbol Highlight',
			precondition: ctxHasWordHighlights.toNegated(),
			kbOpts: {
				kbExpr: EditorContextKeys.editorTextFocus,
				primary: 0,
				weight: KeybindingWeight.EditorContrib
			}
		});
	}