This function takes a character as input. If no class
with this name exists, the function calls setClass and
creates one, derived from Resource. The function returns
its input, i.e. its use lies in its side effect.
Usage
resource(id, verbose = getOption("verbose"))
Arguments
id
character, identifier of the resource
verbose
if TRUE, diagnostic messages. Defaults to
getOption("verbose").
Details
The function is useful for defining query methods
for data classes derived from xdata. It enables
dispatching on the signature, which is the main reason
for the function.