./revenue-distribution-token-1.0.0-beta.1/contracts/RevenueDistributionToken.sol:    // TODO: Revisit returns
./revenue-distribution-token-1.0.0-beta.1/contracts/RevenueDistributionToken.sol:        // TODO: investigate whether leave this `require()` in for clarity from error message, or let the safe math check in `callerAllowance - shares_` handle the underflow.
