code: protected Map<String, String> getElementAttributes() {
          // Preserve order of attributes
          Map<String, String> attrs = new HashMap<>();
  
          if (this.getAction() != null) {
              attrs.put("action", this.getAction().toString());
          }
          if (this.getMethod() != null) {
              attrs.put("method", this.getMethod().toString());
          }
          if (this.getWaitUrl() != null) {
              attrs.put("waitUrl", this.getWaitUrl().toString());
          }
          if (this.getWaitUrlMethod() != null) {
              attrs.put("waitUrlMethod", this.getWaitUrlMethod().toString());
          }
          if (this.getWorkflowSid() != null) {
              attrs.put("workflowSid", this.getWorkflowSid());
          }
  
          return attrs;
      }
docs: Attributes to set on the generated XML element
  
  @return A Map of attribute keys to values