[
  {
    "name": "blockquote",
    "attributes": [
      { "name": "author", "type": "text", "label": "Author Name", "placeholder": "e.g. James Baldwin" },
      { "name": "source", "type": "text", "label": "Source Citation", "placeholder": "e.g. The Fire Next Time" }
    ]
  },
  "pullquote",
  {
    "name": "info",
    "attributes": [
      { "name": "title", "type": "text", "label": "Notice Title", "placeholder": "e.g. Note" },
      { "name": "collapsible", "type": "boolean", "label": "Collapsible?" }
    ]
  },
  "warning"
]