Looks whether the key file has the key key in the group
group_name.
Note
This function does not follow the rules for GError strictly;
the return value both carries meaning and signals an error. To use
this function, you must pass a GError pointer in error, and check
whether it is not NULL to see if an error occurred.
Language bindings should use g_key_file_get_value() to test whether
or not a key exists.
Since 2.6
Looks whether the key file has the key key in the group group_name. Note This function does not follow the rules for GError strictly; the return value both carries meaning and signals an error. To use this function, you must pass a GError pointer in error, and check whether it is not NULL to see if an error occurred. Language bindings should use g_key_file_get_value() to test whether or not a key exists. Since 2.6