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tbl_sum() gives a brief textual description of a table-like object, which should include the dimensions, the data source, and possible grouping (for dplyr). The default implementation forwards to pillar::obj_sum().
tbl_sum()
dplyr
pillar::obj_sum()
tbl_sum(x)
Object to summarise
pillar::type_sum(), pillar::is_vector_s3()
pillar::type_sum()
pillar::is_vector_s3()