docs: protected void setProbeInProgress(boolean inProgress) {
          if (inProgress && !this.probeInProgress) {
              this.probeInProgress = true;
              if (this.probeMethodAdapter != null) {
                  this.mv = this.visitor;
              }
          } else if (!inProgress && this.probeInProgress) {
              this.probeInProgress = false;
              this.mv = probeMethodAdapter != null ? probeMethodAdapter : this.visitor;
          }
      }