k:Knd, l:IdLnk, ds:x:Id fp-> Type, da:a:Knd fp-> Type, f:(IdTop) List,
  x:Id, k1:Knd, d1:x:Id fp-> Type, d2:a:Knd fp-> Type, f1:Top.
  ds || d1
  
  da || d2
  
  ma-single-effect(d1; d2; k1; x; f1) ||+ ma-single-sends(ds; da; k; l; f)

None

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