nl_tokens: Low - level block serializer
pl_tokens: function BlockSerializer ( props ) { const { node , serializers , <mask> , isInline , children } = props const blockType = node . _type const serializer = serializers . types [ blockType ] if ( ! serializer ) { throw new Error ( ` ${ blockType } \` \` ` ) } return h ( serializer , { node , options , isInline } , children ) }