vars_track( x, track_id, track_type = c("seqs", "feats", "links"), ignore = NULL )
A gggenomes or gggenomes_layout object
a quoted or unquoted name or as positive/negative integer giving the position from the left/right.
restrict to these types of tracks - affects position-based selection
names of tracks to ignore when selecting by position.
The selected track_id as an unnamed string