function types.isDataView
          
Usage in Deno
import { types } from "node:util";
isDataView(object: unknown): object is DataView 
      Returns true if the value is a built-in DataView instance.
const ab = new ArrayBuffer(20);
util.types.isDataView(new DataView(ab));  // Returns true
util.types.isDataView(new Float64Array());  // Returns false
See also ArrayBuffer.isView().
object is DataView