support token extraction in expressions

langserver/java/statementtypes/Block.js

@@ -1,8 +1,19 @@
+/**
+ * @typedef {import('../tokenizer').Token} Token
+ */
 const { Statement } = require("./Statement");
 
 class Block extends Statement {
     /** @type {Statement[]} */
     statements = [];
+
+    /**
+     * @param {Token} open 
+     */
+    constructor(open) {
+        super();
+        this.open = open;
+    }
 }
 
 exports.Block = Block;