These options will be used on objects of class 'GuideCustom'.
opts_GuideCustom(constructor = c("guide_custom", "next"), ...)An object of class <constructive_options/constructive_options_GuideCustom>
Depending on constructor, we construct the object as follows:
"guide_custom" (default): We build the object using ggplot2::guide_custom().
"next" : Use the constructor for the next supported class.