<p>The <tr:group> tag is used to group related child elements. This tag does not render anything visually.</p>
a method reference to an attribute change listener. Attribute change events are not delivered for any programmatic change to a property. They are only delivered when a renderer changes a property without the application's specific request. An example of an attribute change events might include the width of a column that supported client-side resizing.
an EL reference that will store the component instance on a
bean. This can be used to give programmatic access to a component
from a backing bean, or to move creation of the component to a backing bean.
the identifier for the component
whether the component is rendered. When set to false, no output will be delivered for this component.