Function default_command 

pub fn default_command<P: ArchiveTypePlugin + ?Sized>(
    p: &P,
    cmd: &str,
    args: &[String],
) -> Result<()>

The shared subcommand set: coords <file> runs the handler’s own extract_metadata over the file (its bytes when readable, else just the path) and prints the coordinate columns — every column up to and including version, or the first column when there is no version.