=head2 $info->invocant
Returns the name of the variable into which the first argument is
-L<C<shift>|perlfunc/shift>ed into automatically, or C<undef> if no such thing
+L<C<shift>|perlfunc/shift>ed automatically, or C<undef> if no such thing
exists. This will usually return C<'$self'> for methods.
=head2 $info->positional_required