save multiple records at once(bulk commit), in Ember 2.2

I know this subject has already been posted around stackoverflow and other forums, still I can't find exact answer.

Single record creation and commit works fine with createRecord and save functions. How do it for bulk record creation and commit it to server? I'm using JSONAPI adapter.

I've read in a discussion that one way would be to create a custom adapter, but I'm not sure what is the correct place to do that... maybe to create saveAllRecords() function or another way is to use pushpayload.

Thanks in advance.