For yaml(), arguments to be bundled into a list and passed to as.yaml.
For print.yaml(), extra arguments. For c.yaml(), "yaml" objects to be concatenated.
# NOT RUN {x <- yaml(title = "My cool title", author = "Ethan P Heinzen")
x
y <- yaml("header-includes" = list("\\usepackage[labelformat=empty]{caption}"))
y
c(x, y)
# }