MxGraph object is not updated with new graph xml

We have upgraded application from angular 10 to 15 with that we upgrade mxGraph from ^3.9.12 to ^4.2.2. In this to load mxGraph diagram for update we assigned xml object but graph is not shown only empty grids are visible.

To Initialization of object

this.newGraph = new Graph(
document.getElementById("newgraph"));


To update object

if (newGraphXML) {
this.newGraph.xml = newGraphXML;
} else {
this.newGraph.readSchema(this.schema);
}


Although we have all data in newGraphXML but still it doesn't show anything after loading page.

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