The allowed values list 'spec' but the description only mentions 'on' and 'off'
"transactions" => {
"type" => STRING,
"description" => "Indicates whether the transactions interceptors are to be installed (on) or not (off).",
"expressions-allowed" => false,
"nillable" => true,
"default" => "off",
"allowed" => [
"ON",
"OFF",
"SPEC"
],
"access-type" => "read-write",
"storage" => "configuration",
"restart-required" => "all-services"
},