Accessor throws exception when used inside another module

[alx9r]

Repro

Invoking

New-Module {
    Import-Module ToolFoundations

    class c {
        hidden $_p = $(Accessor $this {
            get {
                "getter $($this._p)"
            }
            set {
                param ( $arg )
                $this._p = "setter $arg"
            }
        })
    }

    function New-C {[c]::new()}
}

$c = New-C

outputs

Accessor : Exception calling "InvokeWithContext" with "2" argument(s): "The 
term 'get' is not recognized as the name of a cmdlet, function, script file, 
or operable program. Check the spelling of the name, or if a path was 
included, verify that the path is correct and try again."
At line:5 char:24
+         hidden $_p = $(Accessor $this {
+                        ~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [Accessor], MethodInvocationEx 
   ception
    + FullyQualifiedErrorId : CommandNotFoundException,Accessor