add builder functions für configuring soap attachment handling

src/BeSimple/SoapClient/SoapClientBuilder.php

@@ -193,6 +193,42 @@ class SoapClientBuilder extends AbstractSoapBuilder
         return $this;
     }
 
+    /**
+    * SOAP attachment type Base64.
+    *
+    * @return \BeSimple\SoapServer\SoapServerBuilder
+    */
+    public function withBase64Attachments()
+    {
+        $this->options['attachment_type'] = Helper::ATTACHMENTS_TYPE_BASE64;
+
+        return $this;
+    }
+
+    /**
+     * SOAP attachment type SwA.
+     *
+     * @return \BeSimple\SoapServer\SoapServerBuilder
+     */
+    public function withSwaAttachments()
+    {
+        $this->options['attachment_type'] = Helper::ATTACHMENTS_TYPE_SWA;
+
+        return $this;
+    }
+
+    /**
+     * SOAP attachment type MTOM.
+     *
+     * @return \BeSimple\SoapServer\SoapServerBuilder
+     */
+    public function withMtomAttachments()
+    {
+        $this->options['attachment_type'] = Helper::ATTACHMENTS_TYPE_MTOM;
+
+        return $this;
+    }
+
     /**
      * Validate options.
      */