Test if an Object is an fr_col
Examples
col <- fr_col(label = "Treatment", align = "center")
is.fr_col(col) # TRUE
#> [1] TRUE
is.fr_col("text") # FALSE
#> [1] FALSE
Test if an Object is an fr_col
col <- fr_col(label = "Treatment", align = "center")
is.fr_col(col) # TRUE
#> [1] TRUE
is.fr_col("text") # FALSE
#> [1] FALSE