docs: static String parameterNameFor(CtBehavior method, LocalVariableAttribute locals, int i) {
  
          if (locals == null) {
              return Integer.toString(i + 1);
          }
  
          int modifiers = method.getModifiers();
  
          int j = i;
  
          if (Modifier.isSynchronized(modifiers)) {
              // skip object to synchronize upon.
              j++;
              // System.err.println("Synchronized");
          }
          if (Modifier.isStatic(modifiers) == false) {
              // skip "this"
              j++;
              // System.err.println("Instance");
          }
          String variableName = locals.variableName(j);
          // if (variableName.equals("this")) {
          // System.err.println("'this' returned as a parameter name for "
          // + method.getName() + " index " + j
          // +
          // ", names are probably shifted. Please submit source for class in slf4j bugreport");
          // }
          return variableName;
      }