The value from the parenthesis is the implicit parameter and the thing by itself would be the explicit parameter, strategies that do not have express parameters, use implicit parameters, the fillTank system has equally an express and an implicit parameter. Allows choose a more in-depth consider the fillTank strategy in https://this-jav82479.onesmablog.com/the-single-best-strategy-to-use-for-this-jav-69101584