Apply crosswalks in Source inspection methods #11
Description
Source.process applies the Source.props.codes (code value mappings from the data provider) in an initial crosswalk before applying the main manual Source.props.crosswalk. It would be helpful to be able to preview the effect of these codes when inspecting the dataset and drafting the manual crosswalk, for example as Source.glimpse(codes = true).
Similarly, it would be helpful to be able to preview the effect of the main crosswalk without running process on the entire dataset. #8 may help.