code: function BlockSerializer(props) {
      const {node, serializers, options, isInline, children} = props
      const blockType = node._type
      const serializer = serializers.types[blockType]
      if (!serializer) {
        throw new Error(
          `Unknown block type "${blockType}", please specify a serializer for it in the \`serializers.types\` prop`
        )
      }
  
      return h(serializer, {node, options, isInline}, children)
    }
docs: Low-level block serializer