public static MultiValueMap asMultiValueMap(final Map innerMap) {
        return org.springframework.util.CollectionUtils.toMultiValueMap(innerMap);
    }
public static MultiValueMap asMultiValueMap ( final Map innerMap ) { return org . springframework . util . CollectionUtils . toMultiValueMap ( innerMap ) ; }
As multi value map.

@param innerMap the inner map
@return the multi value map