include/eigen/debug/msvc/eigen.natvis

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        <ArrayItems Condition="!(Flags%2)"> <!-- column major layout -->
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  <!-- 2 x 2 Matrix -->
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      <DisplayString>[2, 2] (fixed matrix)</DisplayString>
      <Expand>
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  <!-- 3 x 3 Matrix -->
  <Type Name="Eigen::Matrix&lt;*,3,3,*,*,*&gt;">      
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  <!-- Dynamic x Dynamic Matrix -->
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  <!-- Dynamic x Fixed Matrix -->
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          <Size>m_storage.m_cols</Size>
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  <!-- Dynamic Row Vector -->
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