First/second participant in parralel-explicit scheme

my qestion is: for parraler/explicit of coupling scheme, In configure file, Can the following words be removed:

      <participants first="Fluid" second="abaqus" />

because I think maybe it’s no useful even if you write it down

Good point! They are still part of the configuration, but I guess their use is not particularly obvious. Still, it matters, e.g., in the data initialization.

Other than that, I think it is mostly a technical reason that we have these, as it keeps the code cleaner and more general, instead of having a special case: