Updated: GAS Library - RangeListApp
RangeListApp was updated to v1.0.1. v1.0.1 (September 13, 2018) New method of “expandA1Notations” was added. This method can expand the a1Notations. For example, A1:C2 is expanded to "A1","B1","C1","A2","B2","C2". You can check this at https://github.