The easiest way to create a grouped SpatVector is to call the
group_by() method on a SpatVector: this will take care of capturing
the unevaluated expressions for you. See group_by.SpatVector() for details.
This function is the adapted version of dplyr::is_grouped_df().
See also group_data.SpatVector() for the accessory functions that retrieve
various metadata from a grouped SpatVector.
See also
Other helpers:
compare_spatrasters(),
is_regular_grid(),
pull_crs()