code: public void delete(int key) {
          int i = ContainerHelpers.binarySearch(mKeys, mSize, key);
  
          if (i >= 0) {
              System.arraycopy(mKeys, i + 1, mKeys, i, mSize - (i + 1));
              System.arraycopy(mValues, i + 1, mValues, i, mSize - (i + 1));
              mSize--;
          }
      }
docs: Removes the mapping from the specified key, if there was any.