How to reference a schema from a schema in Sanity.io

export default defineType({
  name: "section",
  title: "Section",
  type: "object",
  fields: [

    defineField({
      type: "array",
      name: "blocks",
      title: "Content",
      of: [

        defineArrayMember(codeBlock), // <-- You can't do this with section because of circular reference
        
        defineArrayMember({ // <-- SO is this what you're supposed to do?
          name: "section",
          title: "Section",
          type: "section",
        }),

      ],
    }),

  ],

});

export default defineConfig({
  // ...other config
  schema: {
    types: [
      defineType({
        name: 'codeBlock',
        type: 'object',
        fields: [
          defineField({
            name: 'language',
            type: 'string',
          }),
          defineField({
            name: 'code',
            type: 'text',
          }),
        ],
      }),
      defineType({
        name: 'blocks',
        type: 'array',
        of: [
          defineArrayMember({
            type: 'section',
          }),
          defineArrayMember({
            type: 'codeBlock',
          }),
        ],
      }),
      defineType({
        name: 'section',
        type: 'object',
        fields: [
          defineField({
            name: 'blocks',
            type: 'blocks',
          }),
        ],
      }),
      defineType({
        name: 'post',
        type: 'document',
        title: 'Post',
        fields: [
          defineField({
            name: 'title',
            type: 'string',
          }),
          defineField({
            name: 'content',
            type: 'blocks',
          }),
        ],
      }),
    ],
  },
})