m_lastChunk = l >>> m_chunkBits; m_firstFree = l  &  m_chunkMask;
m_lastChunk = l >>> m_chunkBits; if(m_lastChunk==0 && m_innerFSB!=null) { m_innerFSB.setLength(l,this); } else { m_firstFree = l  &  m_chunkMask; }
  public final void setLength(int l)  {    m_lastChunk = l >>> m_chunkBits;    m_firstFree = l  &  m_chunkMask;  }