How to replace default charset used by wslite responses

WsliteWithDefaultCharsetUTF8.groovy

@Grapes(
    [
        @Grab(group='com.github.groovy-wslite', module='groovy-wslite', version='1.1.2'),
    ]
)

import wslite.rest.*
import wslite.http.HTTP

String restEndpoint = "http://someurl"
String someId = "123"

def client = new RESTClient(restEndpoint)

def myResponse = getWithDefaultCharsetUTF8 { 
    client.get(path:"/someresource/$someId", accept: ContentType.XML) 
}

def getWithDefaultCharsetUTF8(closure){
        def c = closure.clone()
        c.delegate = this
        HTTP.metaClass.'static'.getDEFAULT_CHARSET = { -> 'UTF-8' }
        def response = c()
        HTTP.metaClass.'static'.getDEFAULT_CHARSET = { -> 'ISO-8859-1' }
        return response
}