start concise methods

lib/ast.js

@@ -473,6 +473,10 @@ var AST_Arrow = DEFNODE("Arrow", null, {
     $documentation: "An ES6 Arrow function ((a) => b)"
 }, AST_Lambda);
 
+var AST_ConciseMethod = DEFNODE("ConciseMethod", null, {
+    $documentation: "An ES6 concise method inside an object or class"
+}, AST_Lambda);
+
 var AST_Defun = DEFNODE("Defun", null, {
     $documentation: "A function definition"
 }, AST_Lambda);