code: private void addConstantLong(final int index, final int tag, final long value) {
      add(new Entry(index, tag, value, hash(tag, value)));
    }
docs: Adds a new CONSTANT_Double_info to the constant pool of this symbol table.
  
  @param index the constant pool index of the new Symbol.
  @param tag one of {@link Symbol#CONSTANT_LONG_TAG} or {@link Symbol#CONSTANT_DOUBLE_TAG}.
  @param value a long or double.