export("hist_ci", "is_balanced", "swash")
exportMethods(
    "confint",
    "plot",
    "print",
    "summary" 
)
exportClasses(
    "sbm",
    "sbm_ci" 
)
importFrom("graphics", "abline", "barplot", "hist", "par")
importFrom("methods", "new")
importFrom("stats", "aggregate", "quantile")