private boolean isConcreteClass(AnnotatedType type) {
		JavaType javaType = springDocObjectMapper.jsonMapper().constructType(type.getType());
		Class<?> clazz = javaType.getRawClass();
		return !Modifier.isAbstract(clazz.getModifiers()) && !clazz.isInterface();
	}
Is concrete class boolean.

@param type the type
@return the boolean
springdoc-openapi-starter-common/src/main/java/org/springdoc/core/converters/PolymorphicModelConverter.java