From b3fc5dcdbd407432bec97419e03685239a15932e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=D0=98=D0=B2=D0=B0=D0=BD=20=D0=98=D0=B2=D0=B0=D0=BD=D1=87?=
 =?UTF-8?q?=D1=83=D0=BA?= <iivanchuk@dev.vtb.ru>
Date: Sat, 30 Sep 2023 18:31:23 +0300
Subject: [PATCH] unmodifiable

---
 src/main/java/io/github/eocqrs/ohip/EnvironmentEnvelope.java | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/main/java/io/github/eocqrs/ohip/EnvironmentEnvelope.java b/src/main/java/io/github/eocqrs/ohip/EnvironmentEnvelope.java
index 8ca9602..c8909b2 100644
--- a/src/main/java/io/github/eocqrs/ohip/EnvironmentEnvelope.java
+++ b/src/main/java/io/github/eocqrs/ohip/EnvironmentEnvelope.java
@@ -1,5 +1,6 @@
 package io.github.eocqrs.ohip;
 
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.Map;
 
@@ -68,7 +69,7 @@ protected EnvironmentEnvelope(
   }
 
   @Override
-  public final Map<String, String> value() throws Exception {
+  public final Map<String, String> value() {
     final Map<String, String> vars = new HashMap<>(6);
     vars.put("hostname", this.hostname);
     vars.put("app", this.app);
@@ -76,6 +77,6 @@ public final Map<String, String> value() throws Exception {
     vars.put("username", this.username);
     vars.put("password", this.password);
     vars.put("hotel", this.hotel);
-    return vars;
+    return Collections.unmodifiableMap(vars);
   }
 }