prismic.io Custom Type for a blog post with snippets using "Slices"

blog-post-with-snippets.json

{
  "Main" : {
    "title" : {
      "type" : "StructuredText",
      "config" : {
        "single" : "heading1",
        "placeholder" : "Title"
      }
    },
    "description" : {
      "type" : "StructuredText",
      "config" : {
        "single" : "paragraph,hyperlink",
        "placeholder" : "Description"
      }
    },
    "illustration" : {
      "type" : "Image"
    },
    "body" : {
      "type" : "Slices",
      "config" : {
        "choices" : {
          "snippet" : {
            "type" : "StructuredText",
            "fieldset" : "code",
            "config" : {
              "single" : "preformatted",
              "placeholder" : "paste snippet"
            }
          },
          "text" : {
            "fieldset" : "text",
            "type" : "Group",
            "config" : {
              "repeat" : false,
              "fields" : {
                "content" : {
                  "type" : "StructuredText",
                  "fieldset" : "text",
                  "config" : {
                    "multi" : "heading2,heading3,paragraph,strong,em,hyperlink",
                    "placeholder" : "tell your story..."
                  }
                }
              }
            }
          }
        }
      }
    }
  }
}