Support for added properties in functions to show as functions

[miguelbogota]

It seems that the properties added are supported but when they are functions they are not treat them like one.

Example

The following code:

/**
 * Test function.
 *
 * @returns {string} - Returns a string with 'hello world'.
 */
export function test(): string {
  return 'hello world';
}

/**
 * Variable inside the test function.
 */
test.innerVariable = 'inner variable';

/**
 * Function inside the test function.
 *
 * @returns {string} - Returns a string with 'inner function'.
 */
test.innerFunction = (): string => 'inner function';

Returns the following html:

Both innerVariable and innerFunction are shown as variables even though the innerFunction should be shown as a function.

This is a problem since innerFunction is not well documented: