/**
* @dev get existing flow permissions
* @param token The token used in flow
* @param sender sender of a flow
* @param flowOperator the address we are checking permissions of for sender & token
* @return allowCreate is true if the flowOperator can create flows
* @return allowUpdate is true if the flowOperator can update flows
* @return allowDelete is true if the flowOperator can delete flows
* @return flowRateAllowance The flow rate allowance the flowOperator is granted (only goes down)
*/
function getFlowPermissions(ISuperToken token, address sender, address flowOperator)
internal view
returns (bool allowCreate, bool allowUpdate, bool allowDelete, int96 flowRateAllowance)
