code: @Override
      public boolean getBoolean(int index) {
          synchronized (lock) {
              return CBLConverter.asBoolean(getMValue(internalArray, index).asNative(internalArray));
          }
      }
docs: Gets value at the given index as a boolean.
  
  @param index the index. This value must not exceed the bounds of the array.
  @return the boolean value.