Function pushProvider

docs/external/js/react-dom.development.js:12039–12054

(providerFiber, nextValue)

    }
  }
  function pushProvider(providerFiber, nextValue) {
    var context = providerFiber.type._context;

    {
      push(valueCursor, context._currentValue, providerFiber);
      context._currentValue = nextValue;

      {
        if (context._currentRenderer !== undefined && context._currentRenderer !== null && context._currentRenderer !== rendererSigil) {
          error('Detected multiple renderers concurrently rendering the ' + 'same context provider. This is currently unsupported.');
        }

        context._currentRenderer = rendererSigil;
      }
    }
  }
  function popProvider(providerFiber) {
    var currentValue = valueCursor.current;
    pop(valueCursor, providerFiber);