private static Alias getLocal(String aliasName) {
		Catalog catalog = findNearestCatalogWithAlias(Util.getCwd(), aliasName);
		if (catalog != null) {
			return catalog.aliases.getOrDefault(aliasName, null);
		}
		return null;
	}
Returns the given Alias from the local file system

@param aliasName The name of an Alias
@return An Alias object
src/main/java/dev/jbang/catalog/Alias.java