Scatter by multiple input parameters simultaneously

[jbingham]

Eg, suppose there are 2 input parameters:

sampleName: x, y, z inputFile: fileX, fileY, fileZ

It would be nice to be able to scatter by [x, fileX], [y, fileY], [z, fileZ].

Another variant that might be useful to some people is to scatter by all the permutations, starting with [x, fileX], [x, fileY], [x, fileZ].

CWL supports these variations. Not clear how often they're used.