Jaxb creating boolean method accessor names with "get" instead of "is" prefix

Using jaxb2-maven-plugin and jaxb-xjc, while generating classes jaxb creates boolean accessors with get prefix however I want it to create with java convention "is".

here is the xsd:

    <xsd:complexType name="QueryWorkgroupRequestType">
    <xsd:sequence>
    ...
        <xsd:element name="disabled" type="xsd:boolean" minOccurs="0" maxOccurs="1" />
    ...
    </xsd:sequence>
</xsd:complexType>

and the created method is;

public Boolean getDisabled() {
    return disabled;
}

But I want instead;

public Boolean isDisabled() {
    return disabled;
}

I tried

<xsd:annotation> <xsd:appinfo> <jaxb:globalBindings enableJavaNamingConventions="true" generateIsSetMethod="true"/> </xsd:appinfo> </xsd:annotation> but no chance.