public Builder<T> setPlugin(final String plugin) {
            this.plugin = plugin;
            return this;
        }
Sets the name of the plugin that is associated with this property. This is used on the Openfire System
Properties admin interface to provide filtering capabilities. This will default to Openfire if not set.

@param plugin the name of the plugin creating this property.
@return The current SystemProperty builder
xmppserver/src/main/java/org/jivesoftware/util/SystemProperty.java