Bug 315281 update copyrights for 3.6
bundles/org.eclipse.jface/src/org/eclipse/jface/bindings/CachedBindingSet.java
*            <code>null</code>.
	 */
	final void setPrefixTable(final Map prefixTable) {
		if (prefixTable == null) {
			this.prefixTable = Collections.EMPTY_MAP;
			if (BindingManager.DEBUG) {
				Tracing.printTrace("BINDINGS", "Cannot set a null prefix table, set to EMPTY_MAP"); 
			}
			return;
		}
		this.prefixTable = prefixTable;
	}
	/**
	 * Sets the map of triggers indexed by command identifiers.
	 * 
	 * @param triggersByCommandId
	 *            The map to set; must not be <code>null</code>. This is a
	 *            map of command identifiers (<code>String</code>) to
	 *            triggers (<code>Collection</code> of
	 *            <code>TriggerSequence</code>).
	 */
	final void setTriggersByCommandId(final Map triggersByCommandId) {
		if (triggersByCommandId == null) {
			throw new NullPointerException(
					"Cannot set a null binding resolution"); 
		}
		this.triggersByCommandId = triggersByCommandId;
	}
}