static LS tok_dropImports(LS tok) {
  LS index = toContentsIndexedList(tok);
  L<IntRange> imports = tok_findImports_returnRanges(tok);
  for (IntRange r : imports)
    clearTokens(tok, r);
  ret tok;
}

sS tok_dropImports(S s) {
  ret join(tok_dropImports(javaTok(s)));
}