Looks whether the key file has the key key in the group group_name.
Note that this function does not follow the rules for Error strictly; the return value both carries meaning and signals an error. To use this function, you must pass a Error pointer in throws, and check whether it is not null to see if an error occurred.
Language bindings should use get_value to test whether or not a key exists.
| this |
a KeyFile |
| group_name |
a group name |
| key |
a key name |
|
true if |