reworked MotionContext

Sources/MotionController.swift

@@ -297,7 +297,7 @@ public extension MotionController {
         }
         
         let s = MotionTargetState(transitions: transitions)
-        let v = context.pairedView(for: view) ?? view
+        let v = context.transitionPairedView(for: view) ?? view
         
         for a in animators {
             a.apply(state: s, to: v)

Sources/Preprocessors/CascadePreprocessor.swift

@@ -94,9 +94,9 @@ class CascadePreprocessor: BasePreprocessor {
         let delay = TimeInterval(i) * deltaTime + initialDelay
 
         func applyDelay(view: UIView) {
-          if context.pairedView(for: view) == nil {
+          if context.transitionPairedView(for: view) == nil {
             context[view]?.delay = delay
-          } else if delayMatchedViews, let paired = context.pairedView(for: view) {
+          } else if delayMatchedViews, let paired = context.transitionPairedView(for: view) {
             context[view]?.delay = finalDelay
             context[paired]?.delay = finalDelay
           }