Add Node to seperate class

See commit: aecf003

emojify/src/main/java/io/wax911/emojify/util/tree/Node.kt

@@ -0,0 +1,30 @@
+package io.wax911.emojify.util.tree
+
+import io.wax911.emojify.model.Emoji
+import java.util.HashMap
+
+/**
+ * Node representation of an emoji tree
+ *
+ * @see io.wax911.emojify.util.EmojiTree
+ */
+class Node {
+    private val children = HashMap<Char, Node>()
+
+    internal var emoji: Emoji? = null
+
+    internal val isEndOfEmoji: Boolean
+        get() = emoji != null
+
+    internal fun hasChild(child: Char): Boolean {
+        return children.containsKey(child)
+    }
+
+    internal fun addChild(child: Char) {
+        children[child] = Node()
+    }
+
+    internal fun getChild(child: Char): Node? {
+        return children[child]
+    }
+}