1let objects = [
2  {office: null},
3  {office: {name: 'My Office 1'}},
4  {office: {name: 'My Office 2'}},
5  {office: {name: 'My Office 1'}},
6];
7
8let path = 'office.name';
9let grouped = _(objects)
10  .filter(object => _.has(object, path))
11  .groupBy(path)
12  .value();
13
14console.log(grouped);