$ ./target/release/blend_info --dna blend/factory_v300.blend | grep "\[4\]\[4\]"
    float scale[4][4];
    float drw_focusmat[4][4];
    float drw_normalmat[4][4];
    float mat[4][4];
    float parentinv[4][4];
    float bindmat[4][4];
    float mat[4][4];
    float obmat[4][4];
    float parentinv[4][4];
    float constinv[4][4];
    float imat[4][4];
    float parentinv[4][4];
    float mat[4][4];
    float winmat[4][4];
    float viewmat[4][4];
    float viewinv[4][4];
    float persmat[4][4];
    float persinv[4][4];
    float viewmatob[4][4];
    float persmatob[4][4];
    float twmat[4][4];
    float stabmat[4][4];
    float unistabmat[4][4];
    float imat[4][4];
    float arm_mat[4][4];
    float chan_mat[4][4];
    float pose_mat[4][4];
    float disp_mat[4][4];
    float disp_tail_mat[4][4];
    float constinv[4][4];
    float matrix[4][4];
    float invmat[4][4];
    float invmat[4][4];
    float imat[4][4];
    float inverse[4][4];
    float layer_mat[4][4];
    float layer_invmat[4][4];
    float parentinv[4][4];
    float imat[4][4];
    float obmat[4][4];
    float fluidmat[4][4];
    float fluidmat_wt[4][4];
    float mat[4][4];
    float attenuationmat[4][4];
    float parallaxmat[4][4];
    float mat[4][4];

$ ./target/release/blend_info -n Object blend/factory_v300.blend | grep obmat
  float obmat[4][4]; // 64

$ ./target/release/blend_info -n Object.obmat blend/factory_v279.blend

float somename[4][4];