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import { graphql } from 'graphql';
import * as fetch from 'isomorphic-fetch';

interface IResponse<T> {
  data: T;
}

export default class GraphqlClient {
  private static clientInstance: GraphqlClient;

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await sendWelcomeEmail(...);

client.doOperation('mutation', 'mutation editUser ($welcomeEmailSent: true) { ... }');

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{
  "listings" : [
    {
      "highlights" : [
        "857 SQM WITH 60M FRONTAGE",
        "60K HOLDING INCOME",
        "ENORMOUS POTENTIAL"
      ],
      "price" : 859000,
      "mainPhoto" : {

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{
  "compilerOptions": {
    "outDir": "./lib/",
    "module": "commonjs",
    "target": "es5",
    "jsx": "react",
    "typeRoots": [
      "custom-types/**/*"
    ],
    "types": [

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functions:
  heartbeat:
    handler: lib/endpoints/heartbeat.heartbeat
    events:
      - http:
          path: heartbeat
          method: get
          ...

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import Utils from 'utils';
import { expect } from 'chai';
import { myFunc, myOtherFunctionWhichCallsUtl } from 'myModule';

describe('My awesome suite', () => {
  it('should produce proper output', () => {
    const actual = myFunc(arg1, arg2, arg3);
    const expected = { foo: 'bar' }
    
    expect(actual).to.eql(expected);

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// @t "produces output" myFunc('foo', 'bar', 'baz') ~equals {'foo': 'bar'}
export function myFunc(arg1, arg2, arg3) {
  /* ... function content ... */
}

// @t "calls util" myOtherFunctionWhichCallsUtil(spy('util')) ~expect spy('util').calledOnce
export function myOtherFunctionWhichCallsUtil(utilFn = Utils.utilFunction) {
  /* ... function content ... */
  utilFn();
}

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// @t "foo" foo(1) ~does-my-domain-specific-stuff
export function foo(arg) {
  // does something domain specific
}

// @t "foo" foo(1) ~does-my-domain-specific-stuff
export function bar(arg) {
  // does something domain specific, similar to foo()
}

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export const Person = props =>
  <div>
    <span>{props.firstName}</span>
    <span>{props.lastName}</span>
    {
      props.age > 18 ?
        'Adult' : 'NotAdult'
    }
  </div>

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import * as AWS from "aws-sdk";

const configureBucketLifecycle = (s3, bucketName): Promise<void> => {
  return new Promise((resolve, reject) => {
    s3.putBucketLifecycleConfiguration({
      Bucket: bucketName,
      LifecycleConfiguration: {
        Rules: [
          {
            ID: "Purge if older than 30 days",