I know it is possible to start play_and_detect_speech using multiple builtin grammars like this:

builtin:speech/transcribe\nbuiltin:dtmf/digits

And I know it is possible to specify an inline grammar like this (for hints):

inline:<speech-context>...</speech-context>

But would it be possible to use both a builtin grammar and an inline grammar?

I tried like this but it didn't work:

builtin:dtmf/digits\ninline:<speech-context>...</speech-context>

Was anyone able to use something like this?