void adjustApply() {
			if (mergeManager != null) {
				mergeManager.setApplyEnabled(vPanel.allChoicesAreResolved());
			}
		}
Method called for merging an external that was added in LATEST and one that was added in MY.
@param externalLocations RESULT, LATEST, and MY locations and ORIGINAL is null.
@param monitor task monitor for progress and cancelling.
@throws CancelledException if user cancels the merge.
Ghidra/Features/Base/src/main/java/ghidra/app/merge/listing/ExternalFunctionMerger.java