metro map to reflect conditional branch?

[rafalcode]

the metromap doesn't reflect the seqtk stage is conditional.
it also suggests that multiqc operates on the output of seqtk, which
is trimmed, i.e. not raw, reads. Something like this perhaps?

 +--------------+              +--------------+                               
 |              |              |              |                               
 |              |              |              |                               
 |              |              |              |                               
 |    fastqc    |--------------|  multiqc     |-----------                    
 |              |              |              |                               
 |              |              |              |                               
 |              |              |              |                               
 +--------------+              +--------------+                               
        |                                                                     
        |                                                                     
        |                                                                     
        |                                                                     
        |                                                                     
        |                                                                     
 +--------------+                                                             
 |              |                                                             
 |              |                                                             
 |              |                                                             
 |   seqtk      |----------------------------------------------               
 |              |                                                             
 |              |                                                             
 |              |                                                             
 +--------------+