Function isAsyncFunction

isAsyncFunction(value: any): value is Function
Checks if the provided value is an AsyncFunction
Parameters
- value: any
  Value to be checked
Returns value is Function
True if the value is an AsyncFunction, false otherwise
Since
0.12.3

Remarks
This function checks if the provided value is an AsyncFunction, which is a special type of function that returns a Promise and can be used with the await keyword. Note that this function does not check if the function is a generator or an async generator function. And when using TypeScript and targetting earlier versions of JavaScript, the type of the function may NOT be AsyncFunction and instead be a regular function. This is because the type of the function is determined by the JavaScript engine and not the TypeScript compiler.
Example
```
async function asyncFn() { }
isAsyncFunction(asyncFn);               // true
isAsyncFunction(function() {});         // false
isAsyncFunction(function* () {});       // false
isAsyncFunction(async function* () {}); // false
isAsyncFunction(null);                  // false
isAsyncFunction(undefined);             // false
```
- Defined in lib/src/helpers/base.ts:451