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diff --git a/antlr4-cpp-runtime-4.9.2-source/install/include/antlr4-runtime/atn/ContextSensitivityInfo.h b/antlr4-cpp-runtime-4.9.2-source/install/include/antlr4-runtime/atn/ContextSensitivityInfo.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 {
+
+  /// <summary>
+  /// This class represents profiling event information for a context sensitivity.
+  /// Context sensitivities are decisions where a particular input resulted in an
+  /// SLL conflict, but LL prediction produced a single unique alternative.
+  ///
+  /// <para>
+  /// In some cases, the unique alternative identified by LL prediction is not
+  /// equal to the minimum represented alternative in the conflicting SLL
+  /// configuration set. Grammars and inputs which result in this scenario are
+  /// unable to use <seealso cref="PredictionMode#SLL"/>, which in turn means they cannot use
+  /// the two-stage parsing strategy to improve parsing performance for that
+  /// input.</para>
+  /// </summary>
+  /// <seealso cref= ParserATNSimulator#reportContextSensitivity </seealso>
+  /// <seealso cref= ANTLRErrorListener#reportContextSensitivity
+  ///
+  /// @since 4.3 </seealso>
+  class ANTLR4CPP_PUBLIC ContextSensitivityInfo : public DecisionEventInfo {
+  public:
+    /// <summary>
+    /// Constructs a new instance of the <seealso cref="ContextSensitivityInfo"/> class
+    /// with the specified detailed context sensitivity information.
+    /// </summary>
+    /// <param name="decision"> The decision number </param>
+    /// <param name="configs"> The final configuration set containing the unique
+    /// alternative identified by full-context prediction </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 context sensitivity was
+    /// identified during full-context prediction </param>
+    ContextSensitivityInfo(size_t decision, ATNConfigSet *configs, TokenStream *input, size_t startIndex, size_t stopIndex);
+  };
+
+} // namespace atn
+} // namespace antlr4