parser location inTab

[Gack McShite]

Trying to clean up errors.  I see this pattern a lot, so I assume it
should work.

TrackAVoiceAMusic = #(define-music-function (parser location inTab) (boolean?)
#{
   \tempo 4=106
   \clef #(if $inTab "tab" "treble_8")

and then later

   \context Voice = "TrackAVoiceAMusic" {
      \TrackAVoiceAMusic ##f
   }


or

   \context TabVoice = "TrackAVoiceAMusic" {
      \removeWithTag #'chords
      \removeWithTag #'texts
      \TrackAVoiceAMusic ##t
   }

Originally had \version "2.14.0"
changed to \version "2.18.0"
Same result.

Thanks for hints.