public Boulder untick(String name) {
int i = 0;
while (i < haveSent.size()) {
if (haveSent.get(i).username.equals(name)) {
haveSent.remove(i);
this.update();
return this;
} else {
++i;
}
}
return null;
}
public void removeTriangleListener(TriangleListener listener) {
listeners.remove(listener);
removeTriangleModificationListener(listener);
removeTriangleCommentListener(listener);
}