public CheckMethod getCheckMethod(String fieldName) {
        CheckMethod method = checkMethods.get(fieldName);
        if(method==null) {
            method = new CheckMethod(this,fieldName);
            checkMethods.put(fieldName,method);
        }

        return method;
    }
public CheckMethod getCheckMethod ( String fieldName ) { CheckMethod method = checkMethods . get ( fieldName ) ; if ( method == null ) { method = new CheckMethod ( this , fieldName ) ; checkMethods . put ( fieldName , method ) ; } return method ; }
If the field "xyz" of a {@link Describable} has the corresponding "doCheckXyz" method,
return the model of the check method.
<p>
This method is used to hook up the form validation method to the corresponding HTML input element.