Duplicate names when enumeration has empty value

[F21]

Given the following xsd:

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified">
    <xs:simpleType name="state">
        <xs:restriction base="xs:string">
            <xs:enumeration value="" />
            <xs:enumeration value="AK">
                <xs:annotation>
                    <xs:documentation>Alaska</xs:documentation>
                </xs:annotation>
            </xs:enumeration>
        </xs:restriction>
    </xs:simpleType>
</xs:schema>

If an enumeration has its value set to an empty string, the following code is generated:

// Code generated by https://github.com/gocomply/xsd2go; DO NOT EDIT.
// Models for test
package test

import ()

// XSD ComplexType declarations

// XSD SimpleType declarations

type State string

const State State = "" // Name clashes with State type

const StateAk State = "AK"