function isChildClassimport { isChildClass } from "https://dotland.deno.dev/x/polkadot@0.2.35/util/bundle.ts"; isChildClass<P extends Constructor>(Parent: P, Child?: Constructor | null | unknown): Child is PExamples import { isChildClass } from 'https://deno.land/x/polkadot@0.2.35/util/mod.ts'; console.log('isChildClass', isChildClass(BN, BN); // => true console.log('isChildClass', isChildClass(BN, Uint8Array); // => false Type ParametersP extends ConstructorParametersParent: PoptionalChild: Constructor | null | unknownReturnsChild is P