How to use the flag readOnly in Doctrine 2?

Question

A Doctrine entity can have the flag readOnly.

How should the flag readOnly be used?

/** @Entity(readOnly) */ <-- like this?
/** @Entity(readOnly=true) */ <-- or like this?
class User
{
    //...
}

Answer 1

According to this answer and this issue, the latter is the way to go:

/** @Entity(readOnly=true) */