OpenApi Specification Generator Does not generate oneOf, allOf and anyOf when annotation @Schema(oneOf|allOf|anyOf = {X.class, Y.class}) is specified on a class

@Schema(oneOf = {FormA.class, FormB.class})
public abstract class Form {    
} 

public class FormA extends Form {    
    String code;
    String a;    
    int b;
    
    public String getCode() {        return this.code;    }
    public void setCode(String code) {        this.code = code;    }
    public String getA() {        return this.a;    }
    public void setA(String a) {        this.a = a;    }
    public int getB() {        return this.b;    }
    public void setB(int b) {        this.b = b;    }
} 

public class FormB extends Form {    
    String code;
    int x;    
    String y;

    public String getCode() {        return this.code;    }
    public void setCode(String code) {        this.code = code;    }
    public int getX() {        return this.x;    }
    public void setX(int x) {        this.x = x;    }
    public String getY() {        return this.y;    }
    public void setY(String y) {        this.y = y;    }
} 

public class Wrapper {        
    @JsonProperty("system")    String system;
    @JsonProperty("form")    Form form;

    public String getSystem() {        return this.system;    }
    public void setSystem(String system) {        this.system = system;    }
    public Form getForm() {        return this.form;    }
    @JsonTypeInfo(        use = JsonTypeInfo.Id.NAME,         include = JsonTypeInfo.As.EXTERNAL_PROPERTY,         property = "system")      @JsonSubTypes({         @Type(value = FormA.class, name = "Form A"),         @Type(value = FormB.class, name = "Form B")       })              
    public void setForm(Form form) {        this.form = form;    }
} 

rest("/prototype/")           
.id("rest.proto.oneof")            
.post("oneof")            
.bindingMode(RestBindingMode.json)                        .description("Prototype OneOf")            
.id("proto.oneof")                        
.consumes("application/json")            
.produces(MediaType.APPLICATION_JSON )            
.type(Wrapper.class)                                    
.responseMessage()                
.code(200).message("Oneof working")            
.endResponseMessage() 

....

"Form" : {        
   "type" : "object"      
},      
"FormA" : {        
   "type" : "object",        
   "properties" : {
          "code" : {
            "type" : "string"
          },
          "a" : {
            "type" : "string"
          },
          "b" : {
            "format" : "int32",
            "type" : "integer"
          }
        }
      },
"FormB" : {
        "type" : "object",
        "properties" : {
          "code" : {
            "type" : "string"
          },
          "x" : {
            "format" : "int32",
            "type" : "integer"
          },
          "y" : {
            "type" : "string"
          }
        }
      },
      "Wrapper" : {
        "type" : "object",
        "properties" : {
          "system" : {
            "type" : "string"
          },
          "form" : {
            "$ref" : "#/components/schemas/Form"
          }
        }
      }
    }
 

"Form" : { 
"oneOf" : [
   ....
] 
},