code: private boolean isInlineAppend(FQMethod fqm) {
          if (!SignatureUtils.isPlainStringConvertableClass(fqm.getClassName())) {
              return false;
          }
  
          if (stack.getStackDepth() <= 1) {
              return true;
          }
  
          OpcodeStack.Item itm = stack.getStackItem(1);
          return itm.getUserValue() == UCPMUserValue.INLINE;
      }
docs: looks to see if we are in a inline string append like "(" + a + ")";
  
  @param fqm
  the method that is being called
  @return whether we are in an inline string append