How to use the blockly.unbindEvent_ function in blockly

function(e) {
            if (Blockly.isRightButton(e)) {
              // Right-click.  Don't create a block, let the context menu show.
              return;
            }
            if (duplicateBlock.disabled) {
              // Beyond capacity.
              return;
            }
            duplicateBlock.isInFlyout = false;
            Blockly.unbindEvent_(mousedownEvent);
            duplicateBlock.hideTooltip = null;
            Blockly.Tooltip.hide();
            duplicateBlock.onMouseDown_(e);
            duplicateBlock = null;
          }
        );

BlocklyDialogs.dialogUnbindDragEvents_ = function() {
  if (BlocklyDialogs.dialogMouseUpWrapper_) {
    Blockly.unbindEvent_(BlocklyDialogs.dialogMouseUpWrapper_);
    BlocklyDialogs.dialogMouseUpWrapper_ = null;
  }
  if (BlocklyDialogs.dialogMouseMoveWrapper_) {
    Blockly.unbindEvent_(BlocklyDialogs.dialogMouseMoveWrapper_);
    BlocklyDialogs.dialogMouseMoveWrapper_ = null;
  }
};

BlocklyDialogs.hideDialog = function(opt_animate) {
  if (!BlocklyDialogs.isDialogVisible_) {
    return;
  }
  BlocklyDialogs.dialogUnbindDragEvents_();
  if (BlocklyDialogs.dialogMouseDownWrapper_) {
    Blockly.unbindEvent_(BlocklyDialogs.dialogMouseDownWrapper_);
    BlocklyDialogs.dialogMouseDownWrapper_ = null;
  }

  BlocklyDialogs.isDialogVisible_ = false;
  BlocklyDialogs.dialogDispose_ && BlocklyDialogs.dialogDispose_();
  BlocklyDialogs.dialogDispose_ = null;
  var origin = (opt_animate === false) ? null : BlocklyDialogs.dialogOrigin_;
  var dialog = document.getElementById('dialog');
  var shadow = document.getElementById('dialogShadow');

  shadow.style.opacity = 0;

  function endResult() {
    shadow.style.zIndex = -1;
    shadow.style.visibility = 'hidden';
    var border = document.getElementById('dialogBorder');

BlocklyDialogs.dialogUnbindDragEvents_ = function() {
  if (BlocklyDialogs.dialogMouseUpWrapper_) {
    Blockly.unbindEvent_(BlocklyDialogs.dialogMouseUpWrapper_);
    BlocklyDialogs.dialogMouseUpWrapper_ = null;
  }
  if (BlocklyDialogs.dialogMouseMoveWrapper_) {
    Blockly.unbindEvent_(BlocklyDialogs.dialogMouseMoveWrapper_);
    BlocklyDialogs.dialogMouseMoveWrapper_ = null;
  }
};