Function isGenerator

isGenerator(value: any): value is GeneratorFunction
Checks if the provided value is a GeneratorFunction
Parameters
- value: any
  Value to be checked
Returns value is GeneratorFunction
True if the value is a GeneratorFunction, false otherwise
Since
0.12.3

Remarks
This function checks if the provided value is a GeneratorFunction, which is a special type of function that returns a Generator and can be used with the yield keyword. Note that this function does not check if the function is an async function or an async generator function. And when using TypeScript and targetting earlier versions of JavaScript, the type of the function may NOT be GeneratorFunction and instead be a regular function.
Example
```
function* genFn() { }
isGenerator(genFn);                     // true
isGenerator(function() {});             // false
isGenerator(async function() {});       // false
isGenerator(async function* () {});     // false
isGenerator(null);                      // false
isGenerator(undefined);                 // false
```
- Defined in lib/src/helpers/base.ts:477