boolean setLock(boolean lock) {
		boolean wasLocked = locked;
		locked = lock;
		return wasLocked;
	}
Change the current settings lock.  Attempts to modify locked
settings will be ignored with a logged error.  This is done
to write-protect settings at the public API level.
@param lock true to lock, false to unlock
@return previous lock state
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/data/DataTypeSettingsDB.java