This attribute tells me that he stored the tile information, I looked up the source code in the relevant location on GitHub, but I couldn’t find the information I needed from his output
This is the printout, with the first line showing the map drawing position of tilemap and the second line showing the output of tile_map_data.
(-363, 90)
[0, 0, 149, 254, 90, 0, 1, 0, 0, 0, 0, 0, 0, 0]
This is the relevant source code