How to use the yamljs.YAML.parse function in yamljs

public async compile(ksyCode: string) {
        this.ksyCode = ksyCode;
        this.ksy = YAML.parse(ksyCode);

        var releaseCode = await this.compiler.compile("javascript", this.ksy, null, false);
        var debugCode = await this.compiler.compile("javascript", this.ksy, null, true);
        var debugCodeAll = this.jsCode = Object.values(debugCode).join("\n");

        this.classes = {};

        var self = this;
        function define(name: string, deps: string[], callback: () => any) {
            self.classes[name] = callback();
            self.mainClassName = name;
        }
        define["amd"] = true;

        eval(debugCodeAll);
        console.log("compileKsy", this.mainClassName, this.classes);