Does this seem acceptable? It is kind of hacky feeling...

- iterate through all hasMany relationships of the parent record where the relationship model type matches the type that we are `findMany`ing
  - compare the array of ids we are `findMany`ing with this relationship's ids
  - if the ids match then we've found the correct attribute, save the name

There is one case where this won't extract the correct attribute name - if there are two hasMany relationships of the same model type with the same array of ids. This probably won't matter since requesting either resulting URL should return the same records...