@20minutes/draft-convert/esm/util/blockTypeObjectFunction.js

Extensibly serialize & deserialize Draft.js ContentState

export default (function (typeObject) {
  return function (block) {
    if (typeof typeObject === 'function') {
      // handle case where typeObject is already a function
      return typeObject(block);
    }
    return typeObject[block.type];
  };
});