Bug 125420 [Commands] parameters: allow commands to specify return type
bundles/org.eclipse.core.commands/src/org/eclipse/core/commands/Command.java
stringBuffer.append(',');
			stringBuffer.append(name);
			stringBuffer.append(',');
			stringBuffer.append(description);
			stringBuffer.append(',');
			stringBuffer.append(category);
			stringBuffer.append(',');
			stringBuffer.append(handler);
			stringBuffer.append(',');
			stringBuffer.append(parameters);
			stringBuffer.append(',');
			stringBuffer.append(defined);
			stringBuffer.append(')');
			string = stringBuffer.toString();
		}
		return string;
	}
	/**
	 * Makes this command become undefined. This has the side effect of changing
	 * the name and description to <code>null</code>. This also removes all
	 * state and disposes of it. Notification is sent to all listeners.
	 */
	public final void undefine() {
		string = null;
		final boolean definedChanged = defined;
		defined = false;
		final boolean nameChanged = name != null;
		name = null;
		final boolean descriptionChanged = description != null;
		description = null;