public static FieldStringInfo getFunctionReturnTypeStringInfo(Function function,
			String functionSignatureString) {
		DataType returnType = function.getReturnType();
		return new FieldStringInfo(functionSignatureString, returnType.getName(), 0);
	}
Returns a FieldStringInfo object for the given function's return type.  This info contains
the return type string and its location in the function signature.

@param function The function from which to get the return type.
@param functionSignatureString The function signature string from which to get the return
type string.
@return Returns a FieldStringInfo object for the given function's return type.
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/navigation/FunctionUtils.java