docs: private void ensureCapacity(int delta) {
          ByteBuffer bb = m_container.b();
          int bufferDelta = (bb.position() + delta) - bb.capacity();
          if (bufferDelta > 0) {
              BBContainer ncntnr = DBBPool.allocateUnsafeByteBuffer(bb.capacity() + bufferDelta);
  
              ByteBuffer newbb = ncntnr.b();
              bb.flip();
              newbb.put(bb);
  
              m_container.discard();
              m_container = ncntnr;
          }
      }