docs: protected int nextLookup(int lookup) {
  
          for (++lookup; lookup < hashIndex.newNodePointer; lookup++) {
              if (isObjectKey) {
                  if (objectKeyTable[lookup] != null) {
                      return lookup;
                  }
              } else if (isIntKey) {
                  if (intKeyTable[lookup] != 0) {
                      return lookup;
                  } else if (hasZeroKey && lookup == zeroKeyIndex) {
                      return lookup;
                  }
              } else {
                  if (longKeyTable[lookup] != 0) {
                      return lookup;
                  } else if (hasZeroKey && lookup == zeroKeyIndex) {
                      return lookup;
                  }
              }
          }
  
          return -1;
      }