For instance, in the case of a software implementation, the terms “component” or “functionality” may refer to program code that performs specified tasks when executed on a processing device or devices (e.g., processor(s) 720). The program code can be stored in one or more computer readable memory devices as described above. The illustrated separation of components and functionality into distinct units may reflect an actual physical grouping and allocation of such software and/or hardware, or can correspond to a conceptual allocation of different tasks performed by a single software program and/or hardware unit.