class RuboCop::Cop::Style::HashSyntax

def ruby19_no_mixed_keys_check(node)
  pairs = *node
  if @force_hash_rockets
    check(pairs, ':', MSG_HASH_ROCKETS)
  elsif sym_indices?(pairs)
    check(pairs, '=>', MSG_19)
  else
    check(pairs, ':', MSG_RUBY19_NO_MIXED_KEYS)
  end
end