each must be uniquely identified by the <code>rendererType</code> property.
 </p>

 <p>
 Individual <a href="Renderer.html" title="class in jakarta.faces.render"><code>Renderer</code></a> instances will be instantiated as requested during the rendering process, and will remain
 in existence for the remainder of the lifetime of a web application. Because each instance may be invoked from more
 than one request processing thread simultaneously, they MUST be programmed in a thread-safe manner.
 </p>

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