public boolean removeGroup(final int group) {
        final int start = groupStart(group);
        if (start < 0) {
            return false;
        }
        final int size = groupSize(group);
        for (int i = 0; i < size; i++) {
            remove(start);
        }
        return true;
    }
Adds a new element at the beginning of the group area for given group.
If the given group doesn't exist yet, it is created in the right place and element is added there
@param element element to add
@param group group to assign onto element
main/src/main/java/cgeo/geocaching/utils/GroupedList.java