public static VirtualFile createChildSequent(
Object requestor, @NotNull VirtualFile dir, @NotNull String prefix, @NotNull String extension)
throws IOException {
String fileName = prefix + "." + extension;
int i = 1;
while (dir.findChild(fileName) != null) {
fileName = prefix + i + "." + extension;
i++;
}
return dir.createChildData(requestor, fileName);
}
