It's not that the properly will only be set on construction, it's that
it *can* only be set upon construction.
* @G_PARAM_WRITABLE: the parameter is writable
* @G_PARAM_READWRITE: alias for %G_PARAM_READABLE | %G_PARAM_WRITABLE
* @G_PARAM_CONSTRUCT: the parameter will be set upon object construction
- * @G_PARAM_CONSTRUCT_ONLY: the parameter will only be set upon object construction
+ * @G_PARAM_CONSTRUCT_ONLY: the parameter can only be set upon object construction
* @G_PARAM_LAX_VALIDATION: upon parameter conversion (see g_param_value_convert())
* strict validation is not required
* @G_PARAM_STATIC_NAME: the string used as name when constructing the