wtf doesn't work on functions in arbitrary data structures

[adavies42]

q)d1:``foo!(::;{breakd1})
q)d2:1 2!(::;{breakd2})
q)t:([]a:enlist{breakt})
q)d1[`foo][]
{breakd1}
'breakd1
q))wtf .z.s
`..d1.foo
q))\
q)d2[2][]
{breakd2}
'breakd2
q))wtf .z.s
`
q))\
q)t[0;`a][]
{breakt}
'breakt
q))wtf .z.s
`
q))\
q)