Update- August 2020- you can now load vector geopackage layers directly in 3.14 https://github.com/qgis/QGIS/issues/30827
I have a geopackage layer that I want to always be used in an algorithm in the QGIS 3.6 graphical modeler. When I use the triple dots to navigate to the geopackage it doesn't give me the option to choose a layer in the geopackage. Is there syntax I can use in the file path to identify the layer? In the example screenshot I want to use the layer AOI_Poly2 from the geopackage AOI as the mask layer. It seems like it will work but it chooses the first polygon layer in the gpkg (AOI_poly). I have tried appending "|layername=AOI_poly2" to the file path but the dialog won't let me save. I am using windows 10.