in src/file_icon_map.js [624:637]
function getIconForFile(name = '') {
const directMatch = fileNameIcons[name];
if (directMatch) return directMatch;
const dotPositions = [...name.matchAll(/\./g)].map((match) => match.index);
if (dotPositions.length === 0) return '';
return (
getDeepExtensionIcon(threeFileExtensionIcons, name, getPosition(dotPositions, 3)) ||
getDeepExtensionIcon(twoFileExtensionIcons, name, getPosition(dotPositions, 2)) ||
fileExtensionIcons[name.substring(getPosition(dotPositions, 1)).toLowerCase()] ||
''
);
}