public static Variable getVariable(Variable var, Function otherFunction) {
		Symbol s = getVariableSymbol(var.getSymbol(), otherFunction);
		return s != null ? (Variable) s.getObject() : null;
	}
Given a variable, get the corresponding variable from the 
specified otherFunction.
@param var variable to look for
@param otherFunction other function
@return corresponding variable for otherFunction or null if no such variable exists.
Ghidra/Features/Base/src/main/java/ghidra/program/util/DiffUtility.java