Does IMP imp = imp_implementationWithBlock((void*) objc_unretainedPointer(^(id me, BOOL selected) <p>The following provides a convenient way to add methods to a class at runtime: </p> <pre><code>imp_implementationWithBlock((void*) objc_unretainedPointer(^(id me, BOOL selected) </code></pre> <p>The method can then be added using class_addMethod(). Will these implementations eventually become cached and use the fast-track method dispatching system?</p>