atlas_counts supports server-side grouping of data. Grouping can be
used to return record counts grouped by multiple, valid fields (found by
search_all(fields). Use galah_group_by when using the
group_by argument of atlas_counts to return record counts summed
by one or more valid fields.
# S3 method for data_request
group_by(.data, ...)If any arguments are provided, returns a data.frame with
columns name and type, as per galah_select(); if no arguments
are provided, returns NULL.
An object of class data_request
zero or more individual column names to include
galah_group_by(), with which this function is synonymous.