Cannot execute multiple DeleteCollectionsTask tasks in a single gradle execution

[derms]

E.g. for

task deleteFinalData(type: DeleteCollectionsTask) {
    client = hubConfig.newFinalClient()
    collections = ["Document","Client"]
}

task deleteStagingData(type: DeleteCollectionsTask) {
    client = hubConfig.newStagingClient()
    collections = ["input"]
}

task deleteAllData(dependsOn: [deleteStagingData,deleteFinalData])

if you run

gradle deleteAllData

you get the following error

Execution failed for task ':deleteStagingData'.
> Cannot add extension with name 'collections', as there is an extension already registered with that name.

a work around is supplied here

https://gist.github.com/derms/774f33b70edc1bc3aed5026cb893927e