class_docstr: Provides dock-dropping methods
code: def dropEvent(self, ev):
      area = self.dropArea
      if area is None:
          return
      if area == "center":
          area = "above"
      self.dndWidget.area.moveDock(ev.source(), area, self.dndWidget)
      self.dropArea = None
      self.overlay.setDropArea(self.dropArea)
  
file_path: pyqtgraph/pyqtgraph/dockarea/DockDrop.py
imports: from ..Qt import QtCore, QtGui, QtWidgets
label_desc: Use image node_id 9 for calling the DockDrop obj's underlying member method code with example usage: obj.dropEvent(ev) without return types