This explanation should be added in the NatSpec comments of this function that sends ether with call;
Note that this code probably isnt secure or a good use case for assembly because a lot of memory management and security checks are bypassed.
Use with caution! Some functions in this contract knowingly create dirty bits at the destination of the free memory pointer.
Add this comment to _returnDust  function;
/// @dev Use with caution! Some functions in this contract knowingly create dirty bits at the destination of the free memory pointer. Note that this code probably isnt secure or a good use case for assembly because a lot of memory management and security checks are bypassed.
