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diff --git a/intl/icu/source/i18n/brktrans.h b/intl/icu/source/i18n/brktrans.h
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+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+**********************************************************************
+*   Copyright (C) 2008-2015, International Business Machines
+*   Corporation and others.  All Rights Reserved.
+**********************************************************************
+*   Date        Name        Description
+*   05/11/2008  Andy Heninger  Ported from Java
+**********************************************************************
+*/
+#ifndef BRKTRANS_H
+#define BRKTRANS_H
+
+#include "unicode/utypes.h"
+
+#if !UCONFIG_NO_TRANSLITERATION && !UCONFIG_NO_BREAK_ITERATION
+
+#include "unicode/translit.h"
+
+#include "unicode/localpointer.h"
+
+
+U_NAMESPACE_BEGIN
+
+class UVector32;
+
+/**
+ * A transliterator that pInserts the specified characters at word breaks.
+ * To restrict it to particular characters, use a filter.
+ * TODO: this is an internal class, and only temporary. 
+ * Remove it once we have \b notation in Transliterator.
+ */
+class BreakTransliterator : public Transliterator {
+public:
+
+    /**
+     * Constructs a transliterator.
+     * @param adoptedFilter    the filter for this transliterator.
+     */
+    BreakTransliterator(UnicodeFilter* adoptedFilter = 0);
+
+    /**
+     * Destructor.
+     */
+    virtual ~BreakTransliterator();
+
+    /**
+     * Copy constructor.
+     */
+    BreakTransliterator(const BreakTransliterator&);
+
+    /**
+     * Transliterator API.
+     * @return    A copy of the object.
+     */
+    virtual BreakTransliterator* clone() const override;
+
+    virtual const UnicodeString &getInsertion() const;
+
+    virtual void setInsertion(const UnicodeString &insertion);
+
+    /**
+     * ICU "poor man's RTTI", returns a UClassID for the actual class.
+     */
+    virtual UClassID getDynamicClassID() const override;
+
+    /**
+     * ICU "poor man's RTTI", returns a UClassID for this class.
+     */
+    U_I18N_API static UClassID U_EXPORT2 getStaticClassID();
+
+ protected:
+
+    /**
+     * Implements {@link Transliterator#handleTransliterate}.
+     * @param text          the buffer holding transliterated and
+     *                      untransliterated text
+     * @param offset        the start and limit of the text, the position
+     *                      of the cursor, and the start and limit of transliteration.
+     * @param incremental   if true, assume more text may be coming after
+     *                      pos.contextLimit. Otherwise, assume the text is complete.
+     */
+    virtual void handleTransliterate(Replaceable& text, UTransPosition& offset,
+                                     UBool isIncremental) const override;
+
+ private:
+     LocalPointer<BreakIterator> cachedBI;
+     LocalPointer<UVector32>     cachedBoundaries;
+     UnicodeString               fInsertion;
+
+     static UnicodeString replaceableAsString(Replaceable &r);
+
+    /**
+     * Assignment operator.
+     */
+    BreakTransliterator& operator=(const BreakTransliterator&);
+};
+
+U_NAMESPACE_END
+
+#endif /* #if !UCONFIG_NO_TRANSLITERATION */
+
+#endif