Enum as field in class doesn't show description

What works

Enum directly in the controller.

public enum SomeEnum {	@ApiEnum("First Option")	A, //	@ApiEnum("Second Option")	B, //	C }

 @PostMapping("/some") public void someMethod(@ApiParam("Some description.") SomeEnum param) {}

It shows properly:

Some description. A: First Option B: Second Option C: @ApiEnum annotation not available Available values : A, B, C

Enum nested in class.

SomeEnum the same as above.

public class ParamParent { @ApiModelProperty("Some description.") SomeEnum attribute; }

@PostMapping("/some2") public void someMethod2(@RequestParam ParamParent param) {}

It didn't show details of enum:

Add @ApiModel to class ParamParent,
Add @ApiParam to parameter in controller's method: someMethod2(@ApiParam ParamParent param),
Add or remove @RequestParam to parameter in controller's method: someMethod2(@RequestParam ParamParent param).