The example tag indicates that the following text is an example of how to use the function.
* Takes the factorial of `n`.
* // If there are no code blocks, TypeDoc assumes the whole tag
* // should be a code block. This is not valid TSDoc, but is recognized
* // by VSCode and enables better JSDoc support.
* If there is a code block, then both TypeDoc and VSCode will treat
* text outside of the code block as regular text.
export function factorial(n: number): number;