Refactor response class for clarity

src/main/java/org/openepics/names/rest/beans/response/Response.java

@@ -39,19 +39,6 @@ public class Response {
 
     private static HttpHeaders HEADER_JSON;
 
-    /**
-     * Return http header for content type json.
-     *
-     * @return http header
-     */
-    public static HttpHeaders getHeaderJson() {
-        if (HEADER_JSON == null) {
-            HEADER_JSON = new HttpHeaders();
-            HEADER_JSON.add(Response.CONTENT_TYPE, Response.APP_JSON);
-        }
-        return HEADER_JSON;
-    }
-
     @Schema(description = "Message of the response.")
     private String message = null;
     @Schema(description = "Details for the message of the response.")
@@ -83,6 +70,19 @@ public class Response {
         this.field = field;
     }
 
+    /**
+     * Return http header for content type json.
+     *
+     * @return http header
+     */
+    public static HttpHeaders getHeaderJson() {
+        if (HEADER_JSON == null) {
+            HEADER_JSON = new HttpHeaders();
+            HEADER_JSON.add(Response.CONTENT_TYPE, Response.APP_JSON);
+        }
+        return HEADER_JSON;
+    }
+
     /**
      * Return response message.
      *