public static void addValueIfNotNull( @Nonnull Map<String, String> parameters, @Nonnull String key, Object value ) {
        if( value == null ) {
            return;
        }
        parameters.put(key, value.toString());
    }
public static void addValueIfNotNull ( @ Nonnull Map < String , String > parameters , @ Nonnull String key , Object value ) { if ( value == null ) { return ; } parameters . put ( key , value . toString ( ) ) ; }
Puts the given key/value into the given map only if the value is not null.

@param parameters the map to add to
@param key        the key of the value
@param value      the value to add if not null