function request() {
        return _request.apply(this, arguments);
      }
Need to transform:
 facetFilters = [["field1:value1", "field1:value2"], "field2:value3", "field2:value4"]

Into this:
 field1:=[value1,value2] && field2:=value3 && field2:=value4

Steps:
 - For each item in facetFilters
   - If item is array
     - OR values together.
     - Warn if field names are not the same
   - If item is string, convert to facet:=value format
 - Join strings by &&