Bugfix/6649 angular http client empty body (#6754)

* fix empty body issue

* #6649: add line break

* #6649: improve indentation

* #6649: improve indentation

* #6649: generate code

* #6649: generate samples

* #6649: fix method docs

modules/swagger-codegen/src/main/java/io/swagger/codegen/CodegenOperation.java

@@ -140,6 +140,15 @@ public class CodegenOperation {
         return Arrays.asList("PUT", "PATCH").contains(httpMethod.toUpperCase()) && isMemberPath();
     }
 
+    /**
+     * Check if body param is allowed for the request method
+     *
+     * @return true request method is PUT, PATCH or POST; false otherwise
+     */
+    public boolean isBodyAllowed() {
+        return Arrays.asList("PUT", "PATCH", "POST").contains(httpMethod.toUpperCase());
+    }
+
     /**
      * Check if act as Restful destroy method
      *