code: public Variable[] getVariables(String component) {
  		ArrayList<Variable> ret = this.components.get(component);
  		if (ret == null) return new Variable[0];
  		return ret.toArray(new Variable[ret.size()]);
  	}
docs: Get all the {@link Variable}s contained in this {@link ConstraintSolver}'s {@link ConstraintNetwork}.
  @param component Only {@link Variable}s associated with the given label (component) should be returned.
  @return all the {@link Variable}s contained in this {@link ConstraintSolver}'s {@link ConstraintNetwork}.