Function passthrough_plan 

pub fn passthrough_plan(
    project: &Project,
    range: TimeRange,
    include_audio: bool,
) -> Result<PassthroughPlan, String>

Whether range of project shows its sources untouched.

range is the export’s effective range, already on the frame grid. include_audio is whether the export carries audio.

Errors

Names the first thing in the project that rendering would change.