| ## Check if native or cross-file properties exist | |
| It is now possible to check whether a native property or a cross-file property | |
| exists with `meson.has_external_property('foo')`. This is useful if the | |
| property in question is a boolean and one wants to distinguish between | |
| "set" and "not provided" which can't be done the usual way by passing a | |
| fallback parameter to `meson.get_external_property()` in this particular case. |