Returns information about the arguments accepted by a function. This function returns three values:
Note that particular calls to a generic function may accept additional keywords not included in the third value returned by function-arguments, by virtue of their being recognized by applicable methods.
| function | An instance of <function>. |
| required-number | An instance of <integer>. |
| rest-boolean | An instance of <boolean>. |
| kwd-sequence | An instance of type-union(<simple-object-vector>, singleton(#f), singleton(#”all”)). |