protected int drawMessageSize(){
  int sizeDiff=sizeRange[0] == sizeRange[1] ? 0 : rng.nextInt(sizeRange[1] - sizeRange[0]);
  return sizeRange[0] + sizeDiff;
}

protected int drawMessageSize ( ) { int sizeDiff = sizeRange [ 0 ] == sizeRange [ 1 ] ? 0 : rng . nextInt ( sizeRange [ 1 ] - sizeRange [ 0 ] ) ; return sizeRange [ 0 ] + sizeDiff ; }
generates a ( random ) message size
