Nyall Dawson e670ed334d Allow a "destination" QgsMapLayerStore to be associated with a
QgsExpressionContext, providing a place for layers loaded
during expression preparation/evaluation to be stored

There are no destination stores set by default. The store
is likely to be set only in a limited number of circumstances,
eg in expression contexts used by Processing where we already
have a logical temporary layer store to use (via QgsProcessingContext)
2023-01-09 14:35:50 +10:00
..
2023-01-09 12:03:50 +10:00