message: mmCIF schema type
diff: * @author David Sehnal <david.sehnal@gmail.com>
  */
  -import { Field } from '../schema'
  +import { Field, Block } from '../schema'
  const pooledStr = Field.pooledStr();
  const str = Field.str();
  @@ -226,7 +226,7 @@ const atom_site = {
  pdbx_PDB_model_num: int
  }
  -const schema = {
  +const mmCIF = {
  entry,
  entity,
  exptl,
  @@ -243,4 +243,5 @@ const schema = {
  pdbx_struct_mod_residue,
  atom_site
  };
  -export default schema;
  \ No newline at end of file
  +type mmCIF = Block.Instance<typeof mmCIF>
  +export default mmCIF;
  \ No newline at end of file
  