Added method to create ResultSets from the same type

Author: andrecsilva

src/codemodder/codemods/base_codemod.py

@@ -212,8 +212,7 @@ def _apply_remediation(
         if results:
             for result in results.results_for_rules(rules):
                 # this need to be the same type of ResultSet as results
-                singleton = results.__class__()
-                singleton.add_result(result)
+                singleton = results.from_single_result(result)
                 result_locations = self.get_files_to_analyze(context, singleton)
                 # We do an execution for each location in the result
                 # So we duplicate the resultset argument for each location

src/codemodder/result.py

@@ -284,6 +284,15 @@ def files_for_rule(self, rule_id: str) -> list[Path]:
     def all_rule_ids(self) -> list[str]:
         return list(self.keys())
 
+    @classmethod
+    def from_single_result(cls, result: ResultType) -> Self:
+        """
+        Creates a new ResultSet of the same type with a give result.
+        """
+        new = cls()
+        new.add_result(result)
+        return new
+
     def __or__(self, other):
         result = self.__class__()
         for k in self.keys() | other.keys():