f(
  a = "                                    a",
  b = "                                    b",
  c = "                                    c",
  d = "                                    d"
) 

f(
  a = c("abcdef", "abcdef", "abcdef", "abcdef", "abcdef", "abcdef", "abcdef", "abcdef",
    "abcdef", "abcdef")
) 

\method{mean}{reallyratherquitelongclassname}(
  reallyreatherquitelongargument = "reallyratherquitelongvalue_____________________"
) 

long_replacement_fun(
  x,
  a = "aaaaaaaaaaaaaaaa",
  b = "aaaaaaaaaaaaaaaa",
  c = "aaaaaaaaaaaaaaaa"
) <- value 

