method Decorator.prototype.insertArgumentimport { Decorator } from "https://deno.land/x/ts_morph@15.1.0/mod.ts"; insertArgument(index: number, argumentText: string | WriterFunction): Node<ts.Node>Inserts an argument. Inserts an argument. Parametersindex: number Child index to insert at. argumentText: string | WriterFunction Argument text. ReturnsNode<ts.Node>