public CommandFill(CoordinateDifference nd) { this.nd = nd; }
public CommandFission(CoordinateDifference nd, int m) { _nd = nd; _m = m; }
public CommandSmove(CoordinateDifference lld) { d = lld; }
public CommandLmove(CoordinateDifference sld1, CoordinateDifference sld2) { d1 = sld1; d2 = sld2; }
public CommandVoid(CoordinateDifference nd) { this.nd = nd; }