Creates an association to map between dbus_error_name and Errors
specified by error_domain and error_code.
This is typically done in the routine that returns the Quark for an error domain.
| error_domain |
A Quark for a error domain. |
| error_code |
An error code. |
| dbus_error_name |
A D-Bus error name. |
|
true if the association was created, false if it already exists. |