This function checks if specified key variables are present in each tibble's "id" column and returns only tibbles that contain all required key variables.
Examples
# Create sample data
path <- system.file("extdata", "answers_html", package = "tutorial.helpers")
tibble_list <- gather_submissions(path, "stop")
result <- check_key_vars(tibble_list,
key_vars = c("name", "email"))