Currently it is only possible to get library resources as a string using

libraryResource 'foo.txt'

However, this does not work for binary files and is also awkward to use when you need the resource as a file; you have to use a workaround like

def fooContent = libraryResource 'foo.txt'
writeFile file: 'foo.txt', text: fooContent

It would be handy to have a step which provides the resource as file, like this (file could be optional and per default equal to resource):

libraryResourceAsFile resource: 'foo.txt', file: 'foo-from-resource.txt'