move to dicty layers and targets

masque/traits/__init__.py

@@ -1,7 +1,7 @@
 """
 Traits (mixins) and default implementations
 """
-from .positionable import Positionable, PositionableImpl
+from .positionable import Positionable, PositionableImpl, Bounded
 from .layerable import Layerable, LayerableImpl
 from .rotatable import Rotatable, RotatableImpl, Pivotable, PivotableImpl
 from .repeatable import Repeatable, RepeatableImpl

masque/traits/positionable.py

@@ -60,6 +60,8 @@ class Positionable(metaclass=ABCMeta):
         """
         pass
 
+
+class Bounded(metaclass=ABCMeta):
     @abstractmethod
     def get_bounds(self) -> NDArray[numpy.float64] | None:
         """