Add the given single value to the current list of values for the given key. @param key the key @param value the value to be added
Add all the values of the given list to the current list of values for the given key. @param key they key @param values the values to be added @since 5.0
Add all the values of the given {@code MultiValueMap} to the current values. @param values the values to be added @since 5.0
Return the first value for the given key. @param key the key @return the first value for the specified key, or {@code null} if none
Set the given single value under the given key. @param key the key @param value the value to set
Set the given values under. @param values the values.
Returns the first values contained in this {@code MultiValueMap}. @return a single value representation of this map
Extension of the {@code Map} interface that stores multiple values.
@author Arjen Poutsma