how is a rosconsole message making it to /rosout?

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I've been reading the rosconsole code and I can't find any publisher to /rosout. rosconsole dependencies are only rostime, cpp_common, rostime and console_bridge. Can someone explain exactly how those work?

I see that rosconsole is a wrapper around log4cxx. It handles the initialization, provides vargs interface, formatting and the logging macros. I am confused about what console bridge is supposed to do. There is also the rosout package that dumps the messages on the /rosout topic to a file (which seems redundant to what rosconsole is doing...)

But I can't find a publisher from rosconsole to /rosout