Cleanup type variance in Task builder

dataforge-data/src/commonMain/kotlin/hep/dataforge/data/MapAction.kt

@@ -31,7 +31,7 @@ class MapActionBuilder<T, R>(var name: Name, var meta: MetaBuilder, val actionMe
 
 
 class MapAction<T : Any, out R : Any>(
-    val inputType: KClass<out T>,
+    val inputType: KClass<T>,
     val outputType: KClass<out R>,
     private val block: MapActionBuilder<T, R>.() -> Unit
 ) : Action<T, R> {

dataforge-data/src/commonMain/kotlin/hep/dataforge/data/ReduceAction.kt

@@ -72,7 +72,7 @@ class ReduceGroupBuilder<T : Any, R : Any>(val actionMeta: Meta) {
  * The same rules as for KPipe
  */
 class ReduceAction<T : Any, R : Any>(
-    val inputType: KClass<out T>,
+    val inputType: KClass<T>,
     val outputType: KClass<out R>,
     private val action: ReduceGroupBuilder<T, R>.() -> Unit
 ) : Action<T, R> {

dataforge-data/src/commonMain/kotlin/hep/dataforge/data/SplitAction.kt

@@ -33,7 +33,7 @@ class SplitBuilder<T : Any, R : Any>(val name: Name, val meta: Meta) {
 }
 
 class SplitAction<T : Any, R : Any>(
-    val inputType: KClass<out T>,
+    val inputType: KClass<T>,
     val outputType: KClass<out R>,
     private val action: SplitBuilder<T, R>.() -> Unit
 ) : Action<T, R> {

dataforge-workspace/src/commonMain/kotlin/hep/dataforge/workspace/TaskBuilder.kt

@@ -16,6 +16,7 @@ import kotlin.reflect.KClass
 @DFBuilder
 class TaskBuilder<R : Any>(val name: Name, val type: KClass<out R>) {
     private var modelTransform: TaskModelBuilder.(Meta) -> Unit = { allData() }
+
     //    private val additionalDependencies = HashSet<Dependency>()
     var descriptor: NodeDescriptor? = null
     private val dataTransforms: MutableList<DataTransformation> = ArrayList()
@@ -113,10 +114,13 @@ class TaskBuilder<R : Any>(val name: Name, val type: KClass<out R>) {
         crossinline block: MapActionBuilder<T, R>.(TaskEnv) -> Unit
     ) {
         action(from, to) {
+            val env = this
             MapAction(
                 inputType = T::class,
                 outputType = type
-            ) { block(this@action) }
+            ) {
+                block(env)
+            }
         }
     }
 
@@ -150,10 +154,11 @@ class TaskBuilder<R : Any>(val name: Name, val type: KClass<out R>) {
         crossinline block: ReduceGroupBuilder<T, R>.(TaskEnv) -> Unit        //TODO needs KEEP-176
     ) {
         action(from, to) {
+            val env = this
             ReduceAction(
                 inputType = T::class,
                 outputType = type
-            ) { block(this@action) }
+            ) { block(env) }
         }
     }
 
@@ -189,10 +194,11 @@ class TaskBuilder<R : Any>(val name: Name, val type: KClass<out R>) {
         crossinline block: SplitBuilder<T, R>.(TaskEnv) -> Unit  //TODO needs KEEP-176
     ) {
         action(from, to) {
+            val env = this
             SplitAction(
                 inputType = T::class,
                 outputType = type
-            ) { block(this@action) }
+            ) { block(env) }
         }
     }