question: protected void configureFromProperties ( InputStream is , String rootDirectory ) throws IOException { Properties props = new Properties ( ) ; props . load ( is ) ; props . put ( ROOT_DIR_PATH_PROPERTY , rootDirectory ) ; String oldPrefix = getPropertyPrefix ( ) ; setProperties ( null , props ) ; setPropertyPrefix ( oldPrefix ) ; }
target:  Called with an input stream for a properties file, used for reading tiles.omp files.