question: public static void checkSameHost ( Path path , ExecutionSystem es ) { Host pathHost = Host . fromUri ( path . toUri ( ) ) ; Host esHost = Host . fromUri ( es . uri ( ) ) ; checkArgument ( pathHost . equals ( esHost ) , "path host (%s) must equal execution system host (%s)" , pathHost , esHost ) ; }
target:  Ensures that the given path and execution system refer to the same host.