original.js

new MyReadStream().pipe(new MyDuplex()).pipe(new MyTransform()).pipe(new MyWriteStream())

expect(thisFooVar).toEqual();

var Class = {
  propTypes: {
    field: React.PropTypes.oneOfType([
      React.PropTypes.string,
      React.PropTypes.number
    ])
  }
}

Promise.reject(0)
  .catch(function(num) {
    return "foo";
  })
  .then(function(str) {
    return str;
  })
  .then(function(str) {
    return str;
  })
  .then(function(str) {
    return str;
  })
  .then(function(str) {
    return str;
  })
  .then(function(str) {
    return str;
  });

foo(foo).forEach().filter().foo().bar();
foo(foo).forEach().filter().foo().bar().forEach().filter().foo().bar().forEach().filter().foo().bar();

foo
  .forEach(function() {
  return 5;
  }).map(5).map(y);

function foo() {
  return fetch(
    url, {
    method: "post",
    foo: "bar",
    credentials: "include",
    headers: {
      "Accept": "contsdlfkjsdfkldjs",
      "Accept2": "contsdlfkjsdfkldjs"
    }
  }).then(resp => resp.json())
    .then(obj => callback(obj))
          .then(obj => callback(obj))
          .then(obj => callback(obj))
}

map
  .on(this)
  .then(x => x)
  .then(x => {
    sfsdfsdf
  });

Object.keys(foo).forEach(x => {
  return x;
});

function f() {
  return items.map(item => {
    if (typeof item === "string") {
      return item.length > 2 ? item : null;
    } else {
      return item * 10;
    }
  }).filter(Boolean);
}

const a = foo.callMethod();

printed.js

new MyReadStream()
  .pipe(new MyDuplex())
  .pipe(new MyTransform())
  .pipe(new MyWriteStream());

expect(thisFooVar).toEqual();

var Class = {
  propTypes: {
    field: React.PropTypes.oneOfType([
      React.PropTypes.string,
      React.PropTypes.number
    ])
  }
};

Promise
  .reject(0)
  .catch(function(num) {
    return "foo";
  })
  .then(function(str) {
    return str;
  })
  .then(function(str) {
    return str;
  })
  .then(function(str) {
    return str;
  })
  .then(function(str) {
    return str;
  })
  .then(function(str) {
    return str;
  });

foo(foo).forEach().filter().foo().bar();

foo(foo)
  .forEach()
  .filter()
  .foo()
  .bar()
  .forEach()
  .filter()
  .foo()
  .bar()
  .forEach()
  .filter()
  .foo()
  .bar();

foo
  .forEach(function() {
    return 5;
  })
  .map(5)
  .map(y);

function foo() {
  return fetch(url, {
    method: "post",
    foo: "bar",
    credentials: "include",
    headers: {"Accept": "contsdlfkjsdfkldjs", "Accept2": "contsdlfkjsdfkldjs"}
  })
    .then(resp => resp.json())
    .then(obj => callback(obj))
    .then(obj => callback(obj))
    .then(obj => callback(obj));
}

map
  .on(this)
  .then(x => x)
  .then(x => {
    sfsdfsdf;
  });

Object.keys(foo).forEach(x => {
  return x;
});

function f() {
  return items
    .map(item => {
      if (typeof item === "string") {
        return item.length > 2 ? item : null;
      } else {
        return item * 10;
      }
    })
    .filter(Boolean);
}

const a = foo.callMethod();