code: @Deprecated
      public static XMethod findXMethod(JavaClass[] classList, String methodName, String methodSig) {
          return findXMethod(classList, methodName, methodSig, ANY_METHOD);
      }
docs: Find XMethod for method in given list of classes, searching the classes
  in order.
  
  @param classList
  list of classes in which to search
  @param methodName
  the name of the method
  @param methodSig
  the signature of the method
  @return the XMethod, or null if no such method exists in the class