code: public Arguments set(final int index,
                           final String s) {
          final Pointer<String> stringPointer = nref(s);
          this.argumentRefs.add(stringPointer);
          this.pointer.get(index)
                      .setS(stringPointer);
          return this;
      }
docs: const char *s; string
  
  @param index
  @param s
  
  @return