Class and methods to subset a a flowSet. This is only needed for
method dispatch in the workFlow framework.
subsetting(indices, subsettingId="defaultSubsetting")subsetting object.subsetting(). See the Usage and Arguments
sections for details. subsettingId:"character". An
identifier for the object.indices:"numericOrCharacter". Indices into a flowSet.signature(wf = "workFlow", action =
"subsetting"): The constructor for the workFlow. signature(object = "subsetting", value
= "character"): Set method for the identifier slot. signature(object = "subsetting"): Get
method for the identifier slot. signature(object = "subsetting"): Show details
about the object.