/**
  * False iff there is some evidence that no class described by this pattern exists in the
  * classpath. Conservatively returns true for patterns containing "*", for cases where the virtual
  * machine is not a PathSearchingVirtualMachine, and for anonymous classes for a parent class
  * exists.
  */
 boolean classIsPlausible() {
   if (classId.startsWith("*")
       || classId.endsWith("*")
       || !(Env.vm() instanceof PathSearchingVirtualMachine)) return true;
   else return Env.classMayExist(transClassId);
 }