code: function createPropsPrototype(props, parentProps, propTypes, componentClass) {
    const defaultProps = Object.create(null);
  
    Object.assign(defaultProps, parentProps, props);
  
    // Avoid freezing `id` prop
    const id = getComponentName(componentClass);
    delete props.id;
  
    // Add getters/setters for async prop properties
    Object.defineProperties(defaultProps, {
      // `id` is treated specially because layer might need to override it
      id: {
        configurable: false,
        writable: true,
        value: id
      }
    });
  
    // Add getters/setters for async prop properties
    addAsyncPropsToPropPrototype(defaultProps, propTypes);
  
    return defaultProps;
  }
docs: Builds a pre-merged default props object that component props can inherit from