Gets merge key pair list from keys list
get_merge_key_grid(selector_list, join_keys = teal.data::join_keys())List of merge key pairs between all datasets.
(reactive)
output from data_extract_multiple_srv() or a reactive named list of
outputs from data_extract_srv().
When using a reactive named list, the names must be identical to the shiny
ids of the respective
data_extract_ui().
(join_keys) nested list of keys used for joining.