private boolean isFile(ParameterizedType parameterizedType) {
		Type type = parameterizedType.getActualTypeArguments()[0];
		Class fileClass = ResolvableType.forType(type).getRawClass();
		if (fileClass != null && isFile(fileClass))
			return true;
		else if (type instanceof WildcardType wildcardType) {
			Type[] upperBounds = wildcardType.getUpperBounds();
			return MultipartFile.class.getName().equals(upperBounds[0].getTypeName());
		}
		return false;
	}
Is file boolean.

@param parameterizedType the parameterized type
@return the boolean
springdoc-openapi-starter-common/src/main/java/org/springdoc/core/service/GenericParameterService.java