GRAILS中Criteria的OR的写法

Person.withCriteria{
or{
and{
eq'lastName','Winter'
eq'firstName','Johnny'
}
and{
eq'lastName','Brown'
eq'firstName','Jeff'
}
}
}

上面的语言将对应如下SQL语句

select
this_.idasid0_0_,
this_.versionasversion0_0_,
this_.last_nameaslast3_0_0_,
this_.first_nameasfirst4_0_0_
from
personthis_
where
(
(
this_.last_name='Winter'
andthis_.first_name='Johnny'
)
or(
this_.last_name='Brown'
andthis_.first_name='Jeff'
)
)