text: import * as M from "@effectful/core";
  
  function a() {
    eff(1);
    eff(2);
    return eff(3);
  }
  
  function b() {
    var r;
    eff(1);
    return M.chain(eff(2), _1);
  
    function _1() {
      eff(3);
      return M.chain(eff(4), _2);
    }
  
    function _2() {
      return 5;
    }
  }