static Selector parse(String expression) {
        if (expression.equals("*")) {
            return IDENTITY;
        } else {
            return SelectorParser.parse(expression);
        }
    }
Parses a selector expression.

@param expression Expression to parse.
@return Returns the parsed {@link Selector}.
smithy-model/src/main/java/software/amazon/smithy/model/selector/Selector.java