code: public static ParameterTool fromPropertiesFile(InputStream inputStream) throws IOException {
  		Properties props = new Properties();
  		props.load(inputStream);
  		return fromMap((Map) props);
  	}
docs: Returns {@link ParameterTool} for the given InputStream from {@link Properties} file.
  
  @param inputStream InputStream from the properties file
  @return A {@link ParameterTool}
  @throws IOException If the file does not exist
  @see Properties