elk-util-parent/elk-util-collections/src/main/java/org/semanticweb/elk/util/collections/ArraySlicedSet.java
public boolean remove(int s, Object o) {
		if (o == null)
			throw new NullPointerException();
		int mask = 1 << s;
		int oldMask = removeMask(logs, data, masks, o, mask);
		int newMask = oldMask & ~mask;
		if (newMask == oldMask)
			return false;
		// else
		if (newMask == 0
				&& --occupied == LinearProbing.getLowerSize(data.length))
			shrink();
		sizes[s]--;
		return true;
	}
public boolean remove(int s, Object o) {
		if (o == null)
			throw new NullPointerException();
		int mask = 1 << s;
		int oldMask = removeMask(logs, data, masks, o, mask);
		int newMask = oldMask & ~mask;
		if (newMask == oldMask)
			return false;
		// else
		if (newMask == 0
				&& --occupied == LinearProbing.getLowerSize(data.length))
			shrink();
		sizes[s]--;
		return true;
	}
Removes the given object from the given slice

@param s
the slice id
@param o
the object that should be removed from the given slice
@return {@code true} if the given object is equal to some element of the
given slice; this element will be removed from the slice. If
there is no such an object, {@code false} is returned and nothing
is modified