ResetOptions - Reset all options of a command to their default values.
/f ResetOptions -> -
Usually, a C++-like notation is used to indicate the
availability of the function, if the function is defined in some
"namespace" dictionary.
For example: "arr::Mean".
Ruediger Kupper
28.3.2003, by copy-paste-and-modify from RestoreOptions
/var/www/debian/nest/nest-simulator-2.20.0/lib/sli/mathematica.sli