diff --git a/PyPDF2/__init__.py b/PyPDF4/__init__.py
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diff --git a/PyPDF2/_version.py b/PyPDF4/_version.py
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diff --git a/PyPDF2/filters.py b/PyPDF4/filters.py
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diff --git a/PyPDF2/generic.py b/PyPDF4/generic.py
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diff --git a/PyPDF2/merger.py b/PyPDF4/merger.py
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diff --git a/PyPDF2/pagerange.py b/PyPDF4/pagerange.py
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diff --git a/PyPDF2/pdf.py b/PyPDF4/pdf.py
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diff --git a/PyPDF2/utils.py b/PyPDF4/utils.py
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diff --git a/PyPDF2/xmp.py b/PyPDF4/xmp.py
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