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import mongoose, { connect } from 'mongoose';import { expectType } from 'tsd';
// PromiseexpectType<Promise<typeof mongoose>>(connect('mongodb://localhost:27017/test'));expectType<Promise<typeof mongoose>>(connect('mongodb://localhost:27017/test', {}));expectType<Promise<typeof mongoose>>(connect('mongodb://localhost:27017/test', { bufferCommands: true }));
// CallbackexpectType<void>(connect('mongodb://localhost:27017/test', (err: Error | null) => {  return;}));expectType<void>(connect('mongodb://localhost:27017/test', {}, (err: Error | null) => {  return;}));expectType<void>(connect('mongodb://localhost:27017/test', { bufferCommands: true }, (err: Error | null) => {  return;}));