code: private Properties loadIncludes(File baseDir, Properties properties) throws IOException {
          return loadProperties(baseDir, properties, "include", false);
      }
docs: Recursively read "include" properties files.
  <p>
  "Include" properties are the base properties which are overwritten by
  the provided properties.
  </p>
  
  @param baseDir
  @param properties
  @return the merged properties
  @throws IOException