/**
* Returns whether the given position occurs in the main line of this game.
*
* @param position the position to look for, must not be null
* @return whether the given position occurs in the main line of this game
*/
public boolean containsPosition(ImmutablePosition position) {
boolean res = false;
int index = getCurNode();
gotoStart(true);
for (; ; ) {
if (m_position.getHashCode() == position.getHashCode()) {
res = true;
break;
}
if (!hasNextMove()) break;
goForward(true);
}
gotoNode(index, true);
return res;
}
