method MappedTypeNode.prototype.getTypeNodeimport { MappedTypeNode } from "https://dotland.deno.dev/x/ts_morph@22.0.0/ts_morph.d.ts"; getTypeNode(): TypeNode | undefinedGets the mapped type node's type node if it exists or returns undefined when not. Gets the mapped type node's type node if it exists or returns undefined when not. ReturnsTypeNode | undefined