The value in the parenthesis is definitely the implicit parameter and the object alone will be the specific parameter, solutions that don't have explicit parameters, use implicit parameters, the fillTank process has equally an specific and an implicit parameter. Allows just take a better look at the fillTank strategy in https://thisjav02579.worldblogged.com/34667095/the-smart-trick-of-thisav-that-no-one-is-discussing