allowableValues not working for "range" in @ApiModelProperty

[ashok1979sharma]

I am using 1.0.6 version.
allowableValues works if I give value like allowableValues="Pune", but when I use range it doesn't generate minLength and maxLength attributes in generated swagger json.

@ApiModelProperty(value = "City", allowableValues="range[4, 50]")
@XmlAttribute
private String city;