diff --git a/platform/xdebugger-api/src/com/intellij/xdebugger/mixedMode/XMixedModeHighLevelDebugProcessExtension.kt b/platform/xdebugger-api/src/com/intellij/xdebugger/mixedMode/XMixedModeHighLevelDebugProcessExtension.kt
index 724d5f7a89bd..b0368c367749 100644
--- a/platform/xdebugger-api/src/com/intellij/xdebugger/mixedMode/XMixedModeHighLevelDebugProcessExtension.kt
+++ b/platform/xdebugger-api/src/com/intellij/xdebugger/mixedMode/XMixedModeHighLevelDebugProcessExtension.kt
@@ -17,30 +17,9 @@ import org.jetbrains.annotations.ApiStatus
  */
 @ApiStatus.Internal
 interface XMixedModeHighLevelDebugProcessExtension : XMixedModeDebugProcessExtension {
-  /**
-   * @param stopEventThreadId - XSuspendContext::getActiveExecutionStack must represent a thread with a corresponding id.
-   * MixedModeProcessTransitionStateMachine specifies it when handling some tricky scenarios
-   */
-  fun pauseMixedModeSession(stopEventThreadId : Long?)
-
   suspend fun isStepWillBringIntoLowLevelCode(suspendContext: XSuspendContext): Boolean
 
-  /**
-   * Check that the high-level debugger supports stopping in this suspend context
-   */
-  suspend fun canStopHere(lowSuspendContext: XSuspendContext): Boolean
-
-  suspend fun refreshSuspendContextOnLowLevelStepFinish(suspendContext: XSuspendContext) : XSuspendContext?
-
   fun stoppedInHighLevelSuspendContext(suspendContext: XSuspendContext): Boolean
 
-  suspend fun abortHighLevelStepping()
-
   fun setNextStatement(suspendContext: XSuspendContext, position: XSourcePosition)
-
-  suspend fun afterLowLevelStepCompleted(stoppedThreadId: Long, finishedAsMixedStepOutTest: Boolean);
-
-  suspend fun onLowLevelStepContinueAsItIsGoingToBeMixedStepOut(stoppedThreadId: Long)
-
-  suspend fun needToContinueAfterNativeStepCompleted(stepThreadId: Long): Boolean
 }
\ No newline at end of file