How to use the pilot/dom.removeCssClass function in pilot

showOutput: function(ev) {
        this.output.style.display = 'block';
        dom.removeCssClass(this.hide, 'cmd_hidden');
        dom.addCssClass(this.show, 'cmd_hidden');

        event.stopPropagation(ev);
    },

if (display.predictions && display.predictions.length > 0) {
                hint += ': [ ';
                display.predictions.forEach(function(prediction) {
                    hint += (prediction.name ? prediction.name : prediction);
                    hint += ' | ';
                }, this);
                hint = hint.replace(/\| $/, ']');
            }
        }

        this.hinter.innerHTML = hint;
        if (hint.length === 0) {
            dom.addCssClass(this.hinter, 'cptNoPopup');
        }
        else {
            dom.removeCssClass(this.hinter, 'cptNoPopup');
        }

        this.isUpdating = false;
    },

showOutput: function(ev) {
        this.output.style.display = 'block';
        dom.removeCssClass(this.hide, 'cmd_hidden');
        dom.addCssClass(this.show, 'cmd_hidden');

        event.stopPropagation(ev);
    },

if (display.predictions && display.predictions.length > 0) {
                hint += ': [ ';
                display.predictions.forEach(function(prediction) {
                    hint += (prediction.name ? prediction.name : prediction);
                    hint += ' | ';
                }, this);
                hint = hint.replace(/\| $/, ']');
            }
        }

        this.hinter.innerHTML = hint;
        if (hint.length === 0) {
            dom.addCssClass(this.hinter, 'cptNoPopup');
        }
        else {
            dom.removeCssClass(this.hinter, 'cptNoPopup');
        }

        this.isUpdating = false;
    },

function hideOutput() {
            dom.removeCssClass(this.output, "cptFocusPopup");
            dom.removeCssClass(this.hinter, "cptFocusPopup");
        };
        event.addListener(input, "blur", hideOutput.bind(this));

this.visualizeBlur = function() {
        dom.removeCssClass(this.container, "ace_focus");
    };

function hideOutput() {
            dom.removeCssClass(this.output, "cptFocusPopup");
            dom.removeCssClass(this.hinter, "cptFocusPopup");
        };
        event.addListener(input, "blur", hideOutput.bind(this));

var onMouseDragSelectionEnd = function() {
            dom.removeCssClass(editor.container, "ace_dragging");
            editor.session.removeMarker(dragSelectionMarker);

            if (!self.$clickSelection) {
                if (!dragCursor) {
                    editor.moveCursorToPosition(pos);
                    editor.selection.clearSelection(pos.row, pos.column);
                }
            }

            if (!dragCursor)
                return;

            if (dragRange.contains(dragCursor.row, dragCursor.column)) {
                dragCursor = null;
                return;
            }

this.unsetStyle = function unsetStyle(style) {
      dom.removeCssClass(this.container, style);
    };

if (display.predictions && display.predictions.length > 0) {
                hint += ': [ ';
                display.predictions.forEach(function(prediction) {
                    hint += (prediction.name ? prediction.name : prediction);
                    hint += ' | ';
                }, this);
                hint = hint.replace(/\| $/, ']');
            }
        }

        this.hinter.innerHTML = hint;
        if (hint.length === 0) {
            dom.addCssClass(this.hinter, 'cptNoPopup');
        }
        else {
            dom.removeCssClass(this.hinter, 'cptNoPopup');
        }

        this.isUpdating = false;
    },