code: public synchronized Map<String, MLArray> read(InputStream stream) throws IOException
      {
          return read(stream, new MatFileFilter());
      }
docs: Reads the content of a MAT-file and returns the mapped content.
  <p>
  This method calls <code>read(stream, new MatFileFilter())</code>.
  
  @param stream
  a valid MAT-file stream to be read
  @return the same as <code>{@link #getContent()}</code>
  @throws IOException
  if error occurs during file processing