function _verifyTime( ... ) internal view returns (bool valid) {
    ...
    if ( ... ) { 
        ...
        // Return false as the order is invalid.
        return false; // method 1
    }
    // Return true as the order time is valid.
    valid = true; // method 2
}
function _verifyOrderStatus( ... ) internal pure returns (bool valid) {
    ...
    if ( ... ) {
        // Return false as the order status is invalid.
        return false; // method 1
    }
    // Return true as the order status is valid.
    valid = true; // method 1
}
- valid = true;
+ return true;
