Callable variables and class properties

An interesting use-case came up in the TypeDoc repo (TypeStrong/typedoc#858). Would it be reasonable to define the following as a function rather than a variable? JSDoc users can use @function but from discussions in #8 I don't know if that would be a good thing to carryover.

/**
 * Promisified version of fs.writeFile().
 * @function writeFileAsync
 */
export const writeFileAsync: Function = util.promisify(fs.writeFile);

A similar use case is instance methods. I know that tslint has made changes to view these the same as methods for the purpose of grouping properties and methods.

class Foo {
  constuctor(events: EventService) {
    events.on('someevent', this.bar);
  }


  /**
   * This acts like a method and can be passed as a callback without losing context of `this`.
   * @param param - new value of prop
   */
  bar = (param: String) => {
    console.log('Am I a method?');
    this.prop = param;
  }
}

Start by reading the linked TypeDoc issue TypeStrong/typedoc#858 and the discussions in #8, then compare the callable-variable and instance-property examples in this issue. Done would require a settled specification decision on whether these constructs are treated like functions or methods and how their documentation should be represented.