GLib.KeyFile.prototype.get_integer_list
function get_integer_list(group_name: String, key: String): [return_value: Array(Number(gint)), length: Number(gsize)] {
    // Gjs wrapper for g_key_file_get_integer_list()
}
  Returns the values associated with key under group_name as integers.
If key cannot be found then null is returned and @error is set to #G_KEY_FILE_ERROR_KEY_NOT_FOUND. Likewise, if the values associated with key cannot be interpreted as integers then null is returned and @error is set to #G_KEY_FILE_ERROR_INVALID_VALUE.
Since 2.6
- group_name
- a group name 
- key
- a key 
- return_value
- the values associated with the key as a list of integers, or null if the key was not found or could not be parsed. The returned list of integers should be freed with GLib.free when no longer needed. 
- length
- the number of integers returned