optional argument name documentation template

document {
     Key => optionName,
     Headline => "one line description",
     "There can be explanatory prose here in the form of a hypertext list.",
     EXAMPLE {
          "m2code",
          "m2code",
          "m2code"
          },
     "There can be explanatory prose here in the form of a hypertext list.",
     Caveat => {"warning"}
     }