BlockNodeType:
| "document"
| "list"
| "blockQuote"
| "item"
| "heading"
| "thematicBreak"
| "paragraph"
| "codeBlock"
| "htmlBlock"
| "table"
| "tableHead"
| "tableBody"
| "tableRow"
| "tableCell"
| "tableDelimRow"
| "tableDelimCell"
| "refDef"
| "customBlock"
| "frontMatter"