public void addLandingPad(int x,int z){
  BlockPosition pos=new BlockPosition(x,0,z);
  if (!spawnLocations.contains(pos)) {
    spawnLocations.add(pos);
    occupiedLandingPads.put(pos,false);
  }
}

public void addLandingPad ( int x , int z ) { BlockPosition pos = new BlockPosition ( x , 0 , z ) ; if ( ! spawnLocations . contains ( pos ) ) { spawnLocations . add ( pos ) ; occupiedLandingPads . put ( pos , false ) ; } }
adds a landing pad to the station
