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1 \version "2.17.15"
2
3 \header {
4
5   texidoc = "@code{\\once \\unset} should change a context property
6 value for just one timestep and then return to the previous value."
7
8 }
9 \relative c' {
10   \set fingeringOrientations = #'(left)
11   <e-1>1 |
12   \once \unset fingeringOrientations
13   <e-1>-"default" |
14   <e-1>-"left" |
15
16   \unset fingeringOrientations
17   <e-1>-"default" |
18   \once\unset fingeringOrientations
19   <e-1>-"default" |
20   <e-1>-"default" |
21   \set Score.fingeringOrientations = #'(right)
22   <e-1>-"right"
23   \once\unset fingeringOrientations
24   <e-1>-"right"
25   <e-1>-"right"
26   \once\set fingeringOrientations = #'(left)
27   <e-1>-"left"
28   <e-1>-"right"
29   \set fingeringOrientations = #'(left)
30   <e-1>-"left"
31   \once \unset fingeringOrientations
32   <e-1>-"right"
33   <e-1>-"left"
34   \unset fingeringOrientations
35   \set Score.fingeringOrientations = #'(up down)
36   <e-1>-"default"
37 }