Bug 187796 [KeyBindings] IBindingService cannot return best active bindings for a ParameterizedCommand
IBindingService only supports getBestActiveBindingFor(final String commandId) ... there must be an equivalent method for ParameterizedCommands PW
bundles/org.eclipse.jface/src/org/eclipse/jface/bindings/BindingManager.java
bindingsChanged = true;
			} else {
				newBindings[index++] = b;
			}
		}
		if (bindingsChanged) {
			this.bindings = newBindings;
			bindingCount = index;
			clearCache();
		}
	}
	/**
	 * <p>
	 * Removes a listener from this binding manager.
	 * </p>
	 * <p>
	 * This method completes in amortized <code>O(1)</code>.
	 * </p>
	 * 
	 * @param listener
	 *            The listener to be removed; must not be <code>null</code>.
	 */
	public final void removeBindingManagerListener(
			final IBindingManagerListener listener) {
		removeListenerObject(listener);
	}
	/**
	 * <p>
	 * Removes any binding that matches the given values -- regardless of
	 * command identifier.