code: public static synchronized void disable() {
          if (!enabled) {
              return;
          }
          RxJavaPlugins.setOnObservableAssembly(oldOnObservableAssembly);
          oldOnObservableAssembly = null;
          RxJavaPlugins.setOnConnectableObservableAssembly(oldOnConnectableObservableAssembly);
          oldOnConnectableObservableAssembly = null;
          RxJavaPlugins.setOnCompletableAssembly(oldOnCompletableAssembly);
          oldOnCompletableAssembly = null;
          RxJavaPlugins.setOnSingleAssembly(oldOnSingleAssembly);
          oldOnSingleAssembly = null;
          RxJavaPlugins.setOnMaybeAssembly(oldOnMaybeAssembly);
          oldOnMaybeAssembly = null;
          RxJavaPlugins.setOnFlowableAssembly(oldOnFlowableAssembly);
          oldOnFlowableAssembly = null;
          RxJavaPlugins.setOnConnectableFlowableAssembly(oldOnConnectableFlowableAssembly);
          oldOnConnectableFlowableAssembly = null;
          RxJavaPlugins.setOnParallelAssembly(oldOnParallelAssembly);
          oldOnParallelAssembly = null;
          enabled = false;
      }
docs: Disable {@link RequestContext} during operators.