source_example <- function(
  example,
  env = parent.frame(),
  disable_plots = TRUE
) {
  ex_source <- readLines(system.file(
    "examples",
    example,
    package = "RBesT",
    mustWork = TRUE
  ))
  if (disable_plots) {
    ex_source <- grep("plot\\(", ex_source, value = TRUE, invert = TRUE)
  }
  suppressMessages(
    ex <- source(
      textConnection(ex_source),
      local = env,
      echo = FALSE,
      verbose = FALSE
    )
  )
  invisible(ex)
}