code: public static JavaClassAndMethod findExactMethod(InvokeInstruction inv, ConstantPoolGen cpg) throws ClassNotFoundException {
          return findExactMethod(inv, cpg, ANY_METHOD);
      }
docs: Look up the method referenced by given InvokeInstruction. This method
  does <em>not</em> look for implementations in super or subclasses
  according to the virtual dispatch rules.
  
  @param inv
  the InvokeInstruction
  @param cpg
  the ConstantPoolGen used by the class the InvokeInstruction
  belongs to
  @return the JavaClassAndMethod, or null if no such method is defined in
  the class