How to use the editor/Editor.Editor.getUseTabChar function in editor

function _changeIndentWidth(fullPath, value) {
        $indentWidthLabel.removeClass("hidden");
        $indentWidthInput.addClass("hidden");

        // remove all event handlers from the input field
        $indentWidthInput.off("blur keyup");

        // restore focus to the editor
        MainViewManager.focusActivePane();

        var valInt = parseInt(value, 10);
        if (Editor.getUseTabChar(fullPath)) {
            if (!Editor.setTabSize(valInt, fullPath)) {
                return;     // validation failed
            }
        } else {
            if (!Editor.setSpaceUnits(valInt, fullPath)) {
                return;     // validation failed
            }
        }

        // update indicator
        _updateIndentSize(fullPath);

        // column position may change when tab size changes
        _updateCursorInfo();
    }

} else if (lineUncomment) {
            // Return a null edit. This is a signal to the caller that we should delegate to the
            // line commenting code. We don't want to just generate the edit here, because the edit
            // might need to be coalesced with other line-uncomment edits generated by cursors on the
            // same line.
            edit = null;

        } else {
            // Comment out - add the suffix to the start and the prefix to the end.
            if (canComment) {
                var completeLineSel = sel.start.ch === 0 && sel.end.ch === 0 && sel.start.line < sel.end.line;
                var startCh = _firstNotWs(doc, sel.start.line);
                if (completeLineSel) {
                    if (isIndentLineCommand()) {
                        var endCh = _firstNotWs(doc, sel.end.line - 1);
                        var useTabChar = Editor.getUseTabChar(editor.document.file.fullPath);
                        var indentChar = useTabChar ? "\t" : " ";
                        editGroup.push({
                            text: _.repeat(indentChar, endCh) + suffix + "\n",
                            start: {line: sel.end.line, ch: 0}
                        });
                        editGroup.push({
                            text: prefix + "\n" + _.repeat(indentChar, startCh),
                            start: {line: sel.start.line, ch: startCh}
                        });
                    } else {
                        editGroup.push({text: suffix + "\n", start: sel.end});
                        editGroup.push({text: prefix + "\n", start: sel.start});
                    }
                } else {
                    editGroup.push({text: suffix, start: sel.end});
                    if (isIndentLineCommand()) {

function _getIndentSize() {
        return Editor.getUseTabChar() ? Editor.getTabSize() : Editor.getIndentUnit();
    }

function _getIndentSize(fullPath) {
        return Editor.getUseTabChar(fullPath) ? Editor.getTabSize(fullPath) : Editor.getSpaceUnits(fullPath);
    }

function _updateIndentType(fullPath) {
        var indentWithTabs = Editor.getUseTabChar(fullPath);
        $indentType.text(indentWithTabs ? Strings.STATUSBAR_TAB_SIZE : Strings.STATUSBAR_SPACES);
        $indentType.attr("title", indentWithTabs ? Strings.STATUSBAR_INDENT_TOOLTIP_SPACES : Strings.STATUSBAR_INDENT_TOOLTIP_TABS);
        $indentWidthLabel.attr("title", indentWithTabs ? Strings.STATUSBAR_INDENT_SIZE_TOOLTIP_TABS : Strings.STATUSBAR_INDENT_SIZE_TOOLTIP_SPACES);
    }

function _toggleIndentType() {
        Editor.setUseTabChar(!Editor.getUseTabChar());
        _updateIndentType();
        _updateIndentSize();
    }

function _toggleIndentType() {
        Editor.setUseTabChar(!Editor.getUseTabChar());
        _updateIndentType();
        _updateIndentSize();
    }

DocumentManager.getDocumentForPath(path).done(function (styleDoc) {
            var newRuleInfo = CSSUtils.addRuleToDocument(styleDoc, selectorName, Editor.getUseTabChar(path), Editor.getSpaceUnits(path));
            inlineEditor.addAndSelectRange(selectorName, styleDoc, newRuleInfo.range.from.line, newRuleInfo.range.to.line);
            inlineEditor.editor.setCursorPos(newRuleInfo.pos.line, newRuleInfo.pos.ch);
        });
    }

function _updateIndentType() {
        var indentWithTabs = Editor.getUseTabChar();
        $indentType.text(indentWithTabs ? Strings.STATUSBAR_TAB_SIZE : Strings.STATUSBAR_SPACES);
        $indentType.attr("title", indentWithTabs ? Strings.STATUSBAR_INDENT_TOOLTIP_SPACES : Strings.STATUSBAR_INDENT_TOOLTIP_TABS);
        $indentWidthLabel.attr("title", indentWithTabs ? Strings.STATUSBAR_INDENT_SIZE_TOOLTIP_TABS : Strings.STATUSBAR_INDENT_SIZE_TOOLTIP_SPACES);
    }