Create S2 Cell Union vectors
Usage
s2_cell_union(x = list())
# S3 method for class 's2_cell_union'
as_s2_geography(x, ...)
as_s2_cell_union(x, ...)
# S3 method for class 's2_cell_union'
as_s2_cell_union(x, ...)
# S3 method for class 's2_cell'
as_s2_cell_union(x, ...)
# S3 method for class 'character'
as_s2_cell_union(x, ...)