The unlist(sapply(object@parameters, as, "character"))
that is normally used for the transform class, gives:
Error in as.vector(x, "list") : cannot coerce type 'closure' to vector of type 'list'

This does not seem to be specific to asinhtGml2, but I am "fixing" it for
asinhtGml2 since that is what I am adding. The other single parameter
transformations (from Gating-ML 1.5) should probably also be fixed. However, I am
not touching the existing transforms since I am slightly worried to accidentally break
some existing functionality.

It does not have any effect on the functionality of the transform
(or the filter that uses this transform).