code: function mergeTypings(typingNames) {
                  if (!typingNames) {
                      return;
                  }
                  for (var _i = 0, typingNames_1 = typingNames; _i < typingNames_1.length; _i++) {
                      var typing = typingNames_1[_i];
                      if (!(typing in inferredTypings)) {
                          inferredTypings[typing] = undefined;
                      }
                  }
              }
docs: Merge a given list of typingNames to the inferredTypings map