diff --git a/platform/xdebugger-impl/rpc/src/com/intellij/platform/debugger/impl/rpc/XDebugSessionApi.kt b/platform/xdebugger-impl/rpc/src/com/intellij/platform/debugger/impl/rpc/XDebugSessionApi.kt
index b7fe97bc527f..70b97fb6b012 100644
--- a/platform/xdebugger-impl/rpc/src/com/intellij/platform/debugger/impl/rpc/XDebugSessionApi.kt
+++ b/platform/xdebugger-impl/rpc/src/com/intellij/platform/debugger/impl/rpc/XDebugSessionApi.kt
@@ -107,14 +107,25 @@ data class XDebugSessionDto(
 
 @ApiStatus.Internal
 @Serializable
-sealed interface XExecutionStacksEvent {
-  @Serializable
-  data class NewExecutionStacks(val stacks: List<XExecutionStackDto>, val last: Boolean) : XExecutionStacksEvent
+sealed interface XExecutionStacksEvent
 
-  @Serializable
-  data class ErrorOccurred(val errorMessage: @NlsContexts.DialogMessage String) : XExecutionStacksEvent
+@ApiStatus.Internal
+@Serializable
+sealed interface XExecutionStackGroupsEvent {
 }
 
+@ApiStatus.Internal
+@Serializable
+data class NewExecutionStacksEvent(val stacks: List<XExecutionStackDto>, val last: Boolean) : XExecutionStacksEvent, XExecutionStackGroupsEvent
+
+@ApiStatus.Internal
+@Serializable
+data class ErrorOccurredEvent(val errorMessage: @NlsContexts.DialogMessage String) : XExecutionStacksEvent, XExecutionStackGroupsEvent
+
+@ApiStatus.Internal
+@Serializable
+data class NewExecutionStackGroupsEvent(val groups: List<XExecutionStackGroupDto>, val last: Boolean) : XExecutionStackGroupsEvent
+
 @ApiStatus.Internal
 @Serializable
 data class XExecutionStackDto(