code: public static IBond.Stereo convertStereo(int stereoValue) {
          IBond.Stereo stereo = IBond.Stereo.NONE;
          if (stereoValue == 1) {
              // up bond
              stereo = IBond.Stereo.UP;
          } else if (stereoValue == 6) {
              // down bond
              stereo = IBond.Stereo.DOWN;
          } else if (stereoValue == 0) {
              // bond has no stereochemistry
              stereo = IBond.Stereo.NONE;
          } else if (stereoValue == 4) {
              //up or down bond
              stereo = IBond.Stereo.UP_OR_DOWN;
          } else if (stereoValue == 3) {
              //e or z undefined
              stereo = IBond.Stereo.E_OR_Z;
          }
          return stereo;
      }
docs: Get stereo value as Stereo enum
  @param stereoValue