Does BizAgi allow the use of a "black box" process in a collaboration diagram?
In a Collaboration diagram, a process interacts with one or more additional processes.
If the flow of these interacting processes is known (=white box), we can represent them with additional pools.
But what if the flow is unknown, or irrelevant to the main process (=black box)?
Cf. the first diagram shown on the following blog page under the heading "Collaboration diagram":