Get a Crunch object's dataset URL
datasetReference(x)
# S4 method for class 'CrunchDataset'
datasetReference(x)
# S4 method for class 'CrunchVariable'
datasetReference(x)
# S4 method for class 'CrunchExpr'
datasetReference(x)
# S4 method for class 'ShojiObject'
datasetReference(x)
# S4 method for class 'character'
datasetReference(x)
# S4 method for class 'ANY'
datasetReference(x)
The URL of the dataset which contains that object