LockService

What it does

Serialize concurrent script execution with document, user, or script locks.

Official Google docs

Explore

Related methods

.getScriptLock()
Returns a lock shared by all runs of the script.
.releaseLock()
Releases a lock so other script runs can continue.
.getDocumentLock()
Returns a lock tied to the current spreadsheet or doc.
.tryLock()
Tries to acquire the lock without waiting.
.waitLock()
Waits until the lock is available, then acquires it.

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