static ssize_t wait_any_for(const std::vector<ExecPtr>& execs, double timeout);
/** @brief On sequential executions, returns the amount of flops that remain to be done; This cannot be used on
static ssize_t wait_any_for(const std::vector<ExecPtr>& execs, double timeout);
/** @brief On sequential executions, returns the amount of flops that remain to be done; This cannot be used on