code: protected Response getConfiguration(final String extensionId, final Sid accountSid, final MediaType responseType) {
          //Parameter "extensionId" could be the extension Sid or extension name.
  
          ExtensionConfiguration extensionConfiguration = null;
          ExtensionConfiguration extensionAccountConfiguration = null;
          Sid extensionSid = null;
          String extensionName = null;
  
          if(Sid.pattern.matcher(extensionId).matches()){
              extensionSid = new Sid(extensionId);
          } else {
              extensionName = extensionId;
          }
  
          if (Sid.pattern.matcher(extensionId).matches()) {
              try {
                  extensionConfiguration = extensionsConfigurationDao.getConfigurationBySid(extensionSid);
              } catch (Exception e) {
                  return status(NOT_FOUND).build();
              }
          } else {
              try {
                  extensionConfiguration = extensionsConfigurationDao.getConfigurationByName(extensionName);
              } catch (Exception e) {
                  return status(NOT_FOUND).build();
              }
          }
  
          if (accountSid!=null) {
              if(extensionSid == null ){
                  extensionSid = extensionConfiguration.getSid();
              }
              try {
                  extensionAccountConfiguration = extensionsConfigurationDao.getAccountExtensionConfiguration(accountSid.toString(), extensionSid.toString());
                  extensionConfiguration.setConfigurationData(extensionAccountConfiguration.getConfigurationData(), extensionAccountConfiguration.getConfigurationType());
              } catch (Exception e) {
                  return status(NOT_FOUND).build();
              }
          }
  
          if (extensionConfiguration == null) {
              return status(NOT_FOUND).build();
          } else {
              if (APPLICATION_XML_TYPE.equals(responseType)) {
                  final RestCommResponse response = new RestCommResponse(extensionConfiguration);
                  return ok(xstream.toXML(response), APPLICATION_XML).build();
              } else if (APPLICATION_JSON_TYPE.equals(responseType)) {
                  return ok(gson.toJson(extensionConfiguration), APPLICATION_JSON).build();
              } else {
                  return null;
              }
          }
      }
docs: Will be used to get configuration for extension
  @param extensionId
  @param responseType
  @return