DS.PromiseManyArray Class
A PromiseManyArray is a PromiseArray that also proxies certain method calls to the underlying manyArray. Right now we proxy:
reload()createRecord()on()one()trigger()off()has()

A PromiseManyArray is a PromiseArray that also proxies certain method calls to the underlying manyArray. Right now we proxy:
reload()createRecord()on()one()trigger()off()has()