pull setter to the common class

java/java-impl/src/com/intellij/refactoring/changeSignature/JavaParameterInfo.java

@@ -41,4 +41,5 @@ public interface JavaParameterInfo extends ParameterInfo {
 
   boolean isVarargType();
 
+  default void setType(@Nullable PsiType type) {}
 }

java/java-impl/src/com/intellij/refactoring/changeSignature/ParameterInfoImpl.java

@@ -124,6 +124,7 @@ public class ParameterInfoImpl implements JavaParameterInfo {
     }
   }
 
+  @Override
   public void setType(PsiType type) {
     myType = CanonicalTypes.createTypeWrapper(type);
   }

plugins/groovy/src/org/jetbrains/plugins/groovy/refactoring/changeSignature/GrParameterInfo.java

@@ -155,6 +155,7 @@ public class GrParameterInfo implements JavaParameterInfo {
     myName = newName;
   }
 
+  @Override
   public void setType(@Nullable PsiType type) {
     myTypeWrapper = type == null ? null : CanonicalTypes.createTypeWrapper(type);
   }