# NOT RUN {
validate_input(data.frame(event = 1:2, start = c("2019-01-01", "2019-01-10")),
events = "event", start = "start", end = "end", groups = "group",
linewidth = NULL, title = NULL, showLabels = NULL, show_labels = TRUE,
lineInterval = NULL, background_lines = 11
)
# }
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