/usr/lib/blt2.4/treeview_m.xbm is in blt 2.4z-7ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 | #define testm_width 16
#define testm_height 16
#define testm_x_hot 7
#define testm_y_hot 7
static unsigned char testm_bits[] = {
0xf0, 0x0f, 0xf0, 0x0f, 0xf0, 0x0f, 0xf0, 0x0f, 0xfc, 0x3f, 0xfe, 0x7f,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x7f, 0xfc, 0x3f, 0xf0, 0x0f,
0xf0, 0x0f, 0xf0, 0x0f, 0xf0, 0x0f, 0xf0, 0x0f};
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