How to use the @pnp/sp-clientsvc.objConstructor function in @pnp/sp-clientsvc

public getChanges(info: ChangeInformation): Promise {

        const objectPaths = this._objectPaths.copy();
        const methodParent = objectPaths.lastIndex;

        const inputIndex = objectPaths.add(objConstructor("{1f849fb0-4fcb-4a54-9b01-9152b9e482d3}",
            // actions
            objectPath(),
            ...objectProperties(info),
        ));

        const params = MethodParams.build().objectPath(inputIndex);

        const methodIndex = objectPaths.add(method("GetChanges", params,
            // actions
            objectPath(),
            opQuery([], this.getSelects()),
        ));

        objectPaths.addChildRelationship(methodParent, methodIndex);

        return this.send(objectPaths);

public getChanges(info: ChangeInformation): Promise {

        const objectPaths = this._objectPaths.copy();
        const methodParent = objectPaths.lastIndex;

        const inputIndex = objectPaths.add(objConstructor("{1f849fb0-4fcb-4a54-9b01-9152b9e482d3}",
            // actions
            objectPath(),
            ...objectProperties(info),
        ));

        const params = MethodParams.build().objectPath(inputIndex);

        const methodIndex = objectPaths.add(method("GetChanges", params,
            // actions
            objectPath(),
            opQuery([], this.getSelects()),
        ));

        objectPaths.addChildRelationship(methodParent, methodIndex);

        return this.send(objectPaths);

public getTerms(info: ILabelMatchInfo): ITerms {

        const objectPaths = this._objectPaths.copy();

        // this will be the parent of the GetTerms call, but we need to create the input param first
        const parentIndex = objectPaths.lastIndex;

        // this is our input object
        const input = objConstructor("{61a1d689-2744-4ea3-a88b-c95bee9803aa}",
            // actions
            objectPath(),
            ...objectProperties(info),
        );

        // add the input object path
        const inputIndex = objectPaths.add(input);

        // this sets up the GetTerms call
        const params = MethodParams.build().objectPath(inputIndex);

        // call the method
        const methodIndex = objectPaths.add(method("GetTerms", params,
            // actions
            objectPath()));

public getTerms(info: ILabelMatchInfo): ITerms {

        const objectPaths = this._objectPaths.copy();

        // this will be the parent of the GetTerms call, but we need to create the input param first
        const parentIndex = objectPaths.lastIndex;

        // this is our input object
        const input = objConstructor("{61a1d689-2744-4ea3-a88b-c95bee9803aa}",
            // actions
            objectPath(),
            ...objectProperties(info),
        );

        // add the input object path
        const inputIndex = objectPaths.add(input);

        // this sets up the GetTerms call
        const params = MethodParams.build().objectPath(inputIndex);

        // call the method
        const methodIndex = objectPaths.add(method("GetTerms", params,
            // actions
            objectPath()));