The following policy becomes invalid upon second save because AAM removes properly escaped slashes:
{
"Statement": [
{
"Effect": "deny",
"Resource": "PostType:post:posts",
"Action": "Edit",
"Condition": {
"Equals": {
"(*int)${CALLBACK.AAM\\AddOn\\Boilerplate\\Backend\\Manager::test}": 1
}
}
}
]
}