gistfile1.java

package b;

import org.codehaus.griffon.runtime.core.AbstractGriffonModel;

public class BModel extends AbstractGriffonModel {
    private String input;
    private String output;

    public String getInput() {
        return input;
    }

    public String getOutput() {
        return output;
    }

    public void setInput(String input) {
        firePropertyChange("input", this.input, this.input = input);
    }

    public void setOutput(String output) {
        firePropertyChange("output", this.output, this.output = output);
    }
}

/*
  Groovy equivalent

package b

import groovy.beans.Bindable

class BModel {
    @Bindable String input
    @Bindable String output
}
*/