function vest(address \_beneficiary, uint256 \_amount, uint256 \_isRevocable) external payable whenNotPaused {
    ...
if(\_isRevocable == 0){
    benRevocable\[\_beneficiary] = \[false,false];  // just overwrites the value
}
else if(\_isRevocable == 1){
    benRevocable\[\_beneficiary] = \[true,false]; // just overwrites the value
}
