Always unknown: foobar2000 does not report whether the command finished or whether a dialog it opened was cancelled.
false when the command has no GUID and was handed to a host entry point that reports nothing back, so whether it ran is unknown.
OptionalguidGUID of the command that ran; absent when it was reached by name and has no GUID.
How many tracks the command ran on.
Always true here; a failed call resolves with ApiFailure instead.
Successful response from
menu.runContextCommand.