Example
class MyClass {
private String privateField
}
def prvtClss = new MyClass(privateField: 'qwerty')
println prvtClss.privateField
will print us 'qwerty'
This issue is known since version 1.1 and there is a bug report on that: http://jira.codehaus.org/browse/GROOVY-1875. It is not resolved even with groovy 2 release.
