src/vs/editor/common/config/editorOptions.ts/EditorParameterHints/validate
class EditorParameterHints:	public validate(_input: any): InternalParameterHintOptions {
		if (!_input || typeof _input !== 'object') {
			return this.defaultValue;
		}
		const input = _input as IEditorParameterHintOptions;
		return {
			enabled: boolean(input.enabled, this.defaultValue.enabled),
			cycle: boolean(input.cycle, this.defaultValue.cycle)
		};
	}