Is your feature request related to a problem? Please describe.
There is a lot of potential to limit the database storage for resources by not persisting very verbose fields of FHIR resources like text. In addition to that, there is also a potential to reduce the network bandwidth consumption by not even fetching the verbose fields if there is no utility of these fields in the application.

Describe the solution you'd like
Ability to limit the fields based on the FHIR summary spec for storage as well as fetching from the server (stretch)

@jingtang10