ordering methods allow you to get and set a
VariableOrder on
a CrunchDataset or on the VariableCatalog that
the dataset contains.## S3 method for class 'CrunchDataset':
ordering(x)## S3 method for class 'CrunchDataset':
ordering(x) <- value
## S3 method for class 'VariableCatalog':
ordering(x)
## S3 method for class 'VariableCatalog':
ordering(x) <- value
ordering returns a VariableOrder object, while
ordering<- sets the VariableOrder in value on x