presto-main/src/main/java/io/prestosql/execution/TaskManagerConfig.java/TaskManagerConfig/setTaskYieldThreads
class TaskManagerConfig:    @Config("task.task-yield-threads")
    @ConfigDescription("Number of threads used for setting yield signals")
    public TaskManagerConfig setTaskYieldThreads(int taskYieldThreads)
    {
        this.taskYieldThreads = taskYieldThreads;
        return this;
    }