This is mainly useful for testing, since makes it possible to refer to local and remote tables using exactly the same syntax.
src_local(tbl, pkg = NULL, env = NULL) src_df(pkg = NULL, env = NULL)
name of the function used to generate
Either the name of a package or an environment object in which to look for objects.
src_local() should not be called directly, but instead
one of the constructors should be used.