code: public static MessageSchema parse(final InputStream in, final ParserOptions options) throws Exception
      {
          return parse(new InputSource(in), options);
      }
docs: Wraps the {@link InputStream} into an {@link InputSource} and delegates to
  {@link #parse(InputSource, ParserOptions)}.
  <p>
  <b>Note:</b> this method does not set the {@link InputSource#setSystemId(java.lang.String)} property.
  However, it is recommended to use the {@link #parse(InputSource, ParserOptions)} method directly.
  
  @param in      stream from which schema is read.
  @param options to be applied during parsing.
  @return {@link MessageSchema} encoding for the schema.
  @throws Exception on parsing error.