dimmer:49: error: 'class USI_TWI_S' has no member named 'onRequest'

TinyWireS.onRequest(requestEvent);

^

C:\Users\Ihor\Desktop\dimmer\dimmer.ino: In function 'void loop()':

dimmer:113: error: 'TinyWireS_stop_check' was not declared in this scope

TinyWireS_stop_check();

^

exit status 1
'class USI_TWI_S' has no member named 'onRequest'