Returns a list of suggestions based on the query, based on
PropertySpecifier#baseAutoComplete. Since this specifier accepts comma-separated protocols,
only the partial query after the final comma will be considered for matching against. Each
suggestion returned will contain everything before the final comma followed by an
autocompletion that matches the partial query after the final comma.
Example:
query: "89 (OSPF), 18 (MUX), arp"
suggestions: ["89 (OSPF), 18 (MUX), 91 (LARP)", "89 (OSPF), 18 (MUX), 54 (NARP)"]