code: private String getServerURL(String entityBaseURL, String entityAlias, String processingURL) {
  
          return getServerURL(entityBaseURL, entityAlias, processingURL, null);
  
      }
docs: Creates URL at which the local server is capable of accepting incoming SAML messages.
  
  @param entityBaseURL
  entity ID
  @param processingURL
  local context at which processing filter is waiting
  @return URL of local server