- All Known Implementing Classes:
A functional interface that can be used to return data
D from a source
S where implementations are free to define how and when
data is fetched from source as well how it is internally cached.
The source does not need to worry about caching data but always fetch data as demanded. The way data will actually be cached is an implementation detail.
getReturns data from the given
source. Data is only fetched from
sourceonce and only if necessary, it is up to implementations to decide the momentum to actually fetch data from source.
source- the source from where data will be fetched.
- the data from source