private void validateIndent(final int tokenStart, String indent) {
      int lastLF = indent.lastIndexOf('\n');
      String lastLineIndent = indent.substring(lastLF+1);
      int spaces = 0;
      int tabs = 0;
      final int length = lastLineIndent.length();
      for (int i = 0; i < length; i++) {
        final char c = lastLineIndent.charAt(i);
        if (c == ' ') spaces++;
        else if (c == '\t') tabs++;
      }
      final int problemStart = tokenStart + lastLF + 1;
      if (spaces > 0 && tabs > 0) {
        reportProblem(PyPsiBundle.message("INSP.inconsistent.indentation.mix.tabs.spaces"), problemStart, length);
        // don't know which one is correct => don't complain about inconsistent indentation on subsequent lines which use
        // either tabs or spaces
        myLastSpaces = 0;
        myLastTabs = 0;
      }
      else {
        if (spaces > 0 && myLastTabs > 0) {
          reportProblem(PyPsiBundle.message("INSP.inconsistent.indentation.previous.line.used.tabs.this.line.uses.spaces"),
                        problemStart, length);
        }
        else if (tabs > 0 && myLastSpaces > 0) {
          reportProblem(PyPsiBundle.message("INSP.inconsistent.indentation.previous.line.used.spaces.this.line.uses.tabs"),
                        problemStart, length);
        }
        if (spaces > 0 || tabs > 0) {
          myLastTabs = tabs;
          myLastSpaces = spaces;
        }
      }
    }
private void validateIndent(final int tokenStart, String indent)