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diff --git a/antlr4-cpp-runtime-4.9.2-source/install/include/antlr4-runtime/atn/LookaheadEventInfo.h b/antlr4-cpp-runtime-4.9.2-source/install/include/antlr4-runtime/atn/LookaheadEventInfo.h
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+++ b/antlr4-cpp-runtime-4.9.2-source/install/include/antlr4-runtime/atn/LookaheadEventInfo.h
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+/* Copyright (c) 2012-2017 The ANTLR Project. All rights reserved.
+ * Use of this file is governed by the BSD 3-clause license that
+ * can be found in the LICENSE.txt file in the project root.
+ */
+
+#pragma once
+
+#include "atn/DecisionEventInfo.h"
+
+namespace antlr4 {
+namespace atn {
+
+  /// This class represents profiling event information for tracking the lookahead
+  /// depth required in order to make a prediction.
+  class ANTLR4CPP_PUBLIC LookaheadEventInfo : public DecisionEventInfo {
+  public:
+    /// The alternative chosen by adaptivePredict(), not necessarily
+    ///  the outermost alt shown for a rule; left-recursive rules have
+    ///  user-level alts that differ from the rewritten rule with a (...) block
+    ///  and a (..)* loop.
+    size_t predictedAlt = 0;
+
+    /// <summary>
+    /// Constructs a new instance of the <seealso cref="LookaheadEventInfo"/> class with
+    /// the specified detailed lookahead information.
+    /// </summary>
+    /// <param name="decision"> The decision number </param>
+    /// <param name="configs"> The final configuration set containing the necessary
+    /// information to determine the result of a prediction, or {@code null} if
+    /// the final configuration set is not available </param>
+    /// <param name="input"> The input token stream </param>
+    /// <param name="startIndex"> The start index for the current prediction </param>
+    /// <param name="stopIndex"> The index at which the prediction was finally made </param>
+    /// <param name="fullCtx"> {@code true} if the current lookahead is part of an LL
+    /// prediction; otherwise, {@code false} if the current lookahead is part of
+    /// an SLL prediction </param>
+    LookaheadEventInfo(size_t decision, ATNConfigSet *configs, size_t predictedAlt, TokenStream *input, size_t startIndex,
+                       size_t stopIndex, bool fullCtx);
+  };
+
+} // namespace atn
+} // namespace antlr4