Find the resolver that will make a client from the provided resource object.
resolveResource(x)The resource object which corresponding resolver is to be found.
The corresponding ResourceResolver object or NULL if none applies.
# \donttest{
library(resourcer)
res <- newResource(
  name = "CNSIM1",
  url = "file:///data/CNSIM1.sav",
  format = "spss"
)
resolver <- resolveResource(res)
# }