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Adds a one-line provenance header above the data frame body. The header summarises the query: number of series, observation count, transformation in effect, vintage information, or for non-observation queries, the endpoint and result count.
# S3 method for fred_tbl print(x, ...)
x, invisibly.
x
A fred_tbl.
fred_tbl
Passed to the underlying print.data.frame method.
print.data.frame