Static class methods receive the prototype as the target and not the class

[cneuwirt]

I have a class that looks like

class CustomInstance {
static uniqueEmail(email, @type(Database) database) {
if (email != null && database.hasEmail(email)) {
return ${email} is already taken;
}
}
}

function type(target, propertyKey, parameterIndex) {
...
}

The first argument (target) passed to the type decorator for static method uniqueEmail receives the CustomerInstance.prototype and not the CustomerInstance class itself. This breaks managing the metadata