public boolean removeRootBlock(Block block,boolean cleanupStats){
  boolean foundAndRemoved=mRootBlocks.remove(block);
  if (foundAndRemoved && cleanupStats) {
    mStats.cleanupStats(block);
  }
  return foundAndRemoved;
}

public boolean removeRootBlock ( Block block , boolean cleanupStats ) { boolean foundAndRemoved = mRootBlocks . remove ( block ) ; if ( foundAndRemoved && cleanupStats ) { mStats . cleanupStats ( block ) ; } return foundAndRemoved ; }
remove a block from the workspace .
