Add isLatest to nodes returned from the GetDependencies call.

modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/internal/GraphUtil.kt

@@ -0,0 +1,35 @@
+package com.beust.kobalt.internal
+
+/**
+ * Generic operations on graph-like structures.
+ */
+object GraphUtil {
+    /**
+     * Apply the operation in `closure` to all the nodes in the tree.
+     */
+    fun <T> map(roots: List<T>, children: (T) -> List<T>, closure: (T) -> Unit) {
+        roots.forEach {
+            closure(it)
+            map(children(it), children, closure)
+        }
+    }
+
+    /**
+     * Display each node in the roots by calling the `display` function on each of them.
+     */
+    fun <T> displayGraph(roots: List<T>,
+            children: (T) -> List<T>,
+            display: (node: T, indent: String) -> Unit) {
+
+        fun pd(node: T, indent: String) {
+            display(node, indent)
+            children(node).forEach {
+                pd(it, indent + "    ")
+            }
+        }
+        roots.forEach {
+            pd(it, "")
+        }
+    }
+}
+