question: public static < V > Map < String , V > removeMultiFormParameters ( Map < String , V > parameters ) { Map < String , V > filteredParameters = new HashMap < String , V > ( ) ; for ( Map . Entry < String , V > entry : parameters . entrySet ( ) ) { String key = entry . getKey ( ) ; if ( key != null && ( key . indexOf ( MULTI_ROW_DELIMITER ) != - 1 || key . indexOf ( "_useRowSubmit" ) != - 1 || key . indexOf ( "_rowCount" ) != - 1 ) ) { continue ; } filteredParameters . put ( key , entry . getValue ( ) ) ; } return filteredParameters ; }
target:  Returns a new map containing all the parameters from the input map except for the multi form parameters (usually named according to the ${param}_o_N notation).