class_docstr: A path editor.
  
  Press 't' to toggle vertex markers on and off.  When vertex markers are on,
  they can be dragged with the mouse.
class_docstr_tok: ["A","path","editor",".","Press","'t","'","to","toggle","vertex","markers","on","and","off",".","When","vertex","markers","are","on",",","they","can","be","dragged","with","the","mouse","."]
docstr: Callback for mouse button releases.
docstr_tok: ["Callback","for","mouse","button","releases","."]
code: def on_button_release(self, event):
      """Callback for mouse button releases."""
      if event.button != MouseButton.LEFT or not self.showverts:
          return
      self._ind = None
  
file_path: matplotlib/galleries/examples/event_handling/path_editor.py
imports: import matplotlib.pyplot
  import numpy
  from matplotlib.backend_bases import MouseButton
  from matplotlib.patches import PathPatch
  from matplotlib.path import Path
label_desc: Use image node_id 5 for calling the PathInteractor obj's underlying member method code with example usage: obj.on_button_release(event) without return types