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Allow Frame#expand to return a Promise.

Description

Allow Frame#expand to return a Promise.

As always when transforming token pipeline code, the promise is used only
if you are certain that asynchronous expansion has already been signalled;
the Promise is always resolved asynchronously.

Change-Id: Idc5be49d4c69092d6366a372ebc10ad187b9ea1f

Details

Provenance
cscottAuthored on Feb 5 2018, 5:52 PM
jenkins-botCommitted on Feb 5 2018, 10:42 PM
Parents
rGPAR1f89e97a25b5: Use Promise.async/yield in lib/parse.js
Branches
Unknown
Tags
Unknown
ChangeId
Idc5be49d4c69092d6366a372ebc10ad187b9ea1f

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