void (@NotNull Environment env) { int offset = generateDocOffset(env, null); env.logMessage("Invoke basic completion at " + MadTestingUtil.getPositionDescription(offset, getDocument())); String selectionCharacters = myPolicy.getPossibleSelectionCharacters(); char c = selectionCharacters.charAt(env.generateValue(Generator.integers(0, selectionCharacters.length() - 1), null)); performActionAt(offset, c, env); }