Underfetch ↔ (process) to Data Fetch incomplete data per req, waste extra reqs

aka Underfetching

References

1. Why [**_Underfetching_**](underfetch) is bad? ↔

2. GraphQL ↔ Query Language with Type Sys/Schema to fetch/mutate (graph-like) data on Backend API/Online API. To fix Overfetch/Underfetch. X-lang