refws←{⎕ML←1                            ⍝ Ref to saved ws ⍵.
    ⍵≡'':∇ ⎕WSID                        ⍝ '' is shorthand for ⎕wsid
    nsv1←'⎕CT' '⎕IO' '⎕DIV' '⎕ML'       ⍝ namespace extent ...
    nsv2←'⎕PP' '⎕RL' '⎕RTL' '⎕WX'       ⍝ ... system variables.
    copy←'⎕CY''',⍵,''' ⋄ '              ⍝ copy command.
    lasv←'(##.(↑nsv1,nsv2))'            ⍝ left argt for sysvar copy.
    (⎕NS'')copy,lasv,copy,'⎕this'      ⍝ ref to copied ws.
}
code_colours

test script

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