Fixe recursive prototype search

dataforge-vis-spatial/src/commonMain/kotlin/hep/dataforge/vis/spatial/Proxy.kt

@@ -5,6 +5,7 @@ package hep.dataforge.vis.spatial
 import hep.dataforge.meta.Config
 import hep.dataforge.meta.Laminate
 import hep.dataforge.meta.MetaItem
+import hep.dataforge.meta.descriptors.NodeDescriptor
 import hep.dataforge.meta.get
 import hep.dataforge.names.*
 import hep.dataforge.vis.*
@@ -88,6 +89,9 @@ class Proxy private constructor(
 
     //override fun findAllStyles(): Laminate = Laminate((styles + prototype.styles).mapNotNull { findStyle(it) })
 
+    override val descriptor: NodeDescriptor?
+        get() = prototype.descriptor
+
     inner class ProxyChild(val name: Name) : AbstractVisualObject(),
         VisualGroup {
 
@@ -139,6 +143,9 @@ class Proxy private constructor(
         override fun allProperties(): Laminate =
             Laminate(properties, mergedStyles, prototype.allProperties(), parent?.allProperties())
 
+
+        override val descriptor: NodeDescriptor?
+            get() = prototype.descriptor
     }
 
     companion object {

dataforge-vis-spatial/src/commonMain/kotlin/hep/dataforge/vis/spatial/VisualGroup3D.kt

@@ -40,8 +40,8 @@ class VisualGroup3D : AbstractVisualGroup(), VisualObject3D, PrototypeHolder {
      */
     fun prototypes(builder: MutableVisualGroup.() -> Unit): Unit {
         (prototypes ?: Prototypes().also {
-            attach(it)
             prototypes = it
+            attach(it)
         }).run(builder)
     }
 
@@ -90,7 +90,7 @@ class VisualGroup3D : AbstractVisualGroup(), VisualObject3D, PrototypeHolder {
  * Ger a prototype redirecting the request to the parent if prototype is not found
  */
 tailrec fun PrototypeHolder.getPrototype(name: Name): VisualObject3D? =
-    prototypes?.get(name) as? VisualObject3D ?: (parent as? VisualGroup3D)?.getPrototype(name)
+    prototypes?.get(name) as? VisualObject3D ?: (parent as? PrototypeHolder)?.getPrototype(name)
 
 /**
  * Define a group with given [name], attach it to this parent and return it.