public static Symbol getUniqueSymbol(Program program, String name) {
		return getUniqueSymbol(program, name, null);
	}
Returns the global symbol with the given name if and only if it is the only global symbol
with that name.

@param program the program to search.
@param name the name of the global symbol to find.
@return the global symbol with the given name if and only if it is the only one.
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/symbol/SymbolUtilities.java