請問如何將 data 傳給 dialog about ngx.layer HOT 2 CLOSED

this.dialog.dialog({
	title: "lex 公式编辑器",
	dialogComponent: TargeComponent,
	isModal: false,
	data: {
		mathlex: mathlex,
		parentCallback: (lex, svg) => { · · · }
	}
});

@Component({
	selector: "mathjax",
	template: ` . . . <button [disabled] ="!mathlex" (click)="done();">done</button>  . . .  `
})
export class MathDialog {
	private mathlex;
	private parentCallback;

. . .

	constructor(private ly:NgLayerRef) {}

	private done(){
		/*data from parent component*/
		console.log(this.mathlex);

		/*a callback function from parent component*/
		this.parentCallback(this.sourceLex, this.mathSvg);

		this.ly.close();
	}
}