public void linkInfrastructure(IInfrastructure tile){
  if (tile.linkRocket(this))   ;
  connectedInfrastructure.add(tile);
}

public void linkInfrastructure ( IInfrastructure tile ) { if ( tile . linkRocket ( this ) ) ; connectedInfrastructure . add ( tile ) ; }
links the supplied iinfrastructure with the rocket
