protected Dimension getPreferredMergeToolSize() {
		Dimension screenDim = Toolkit.getDefaultToolkit().getScreenSize();
		return new Dimension(screenDim.width - 200, screenDim.height - 200);
	}
Returns one of the four programs involved in the merge as indicated by the version.
@param version the program version to return. (LATEST, MY, ORIGINAL, or RESULT).
@return the indicated program version or null if a valid version isn't specified.
@see MergeConstants
Ghidra/Features/Base/src/main/java/ghidra/app/merge/MergeManager.java