old_contents: import sublime, sublime_plugin
  import os
  from SublimePlumb.Mouse import MouseCommand
  
  class SublimePlumbSend(MouseCommand):
      """ Sends the current selected text to the plumbing """
      def run(self, edit):
          file_name = self.view.file_name()
          message = {
              "data": self.view.substr(self.selection_at_cursor()),
              "cwd": os.path.dirname(file_name) if file_name else None,
              "src": self.view.id(),
          }
          self.view.run_command("sublime_plumb", message)
          self.remove_selection("1")
          self.view.sel().clear()
new_contents: import sublime, sublime_plugin
  import os
  from SublimePlumb.Mouse import MouseCommand
  
  class SublimePlumbSend(MouseCommand):
      """ Sends the current selected text to the plumbing """
      def run(self, edit):
          file_name = self.view.file_name()
          message = {
              "data": self.view.substr(self.selection_at_cursor()),
              "cwd": os.path.dirname(file_name) if file_name else None,
              "src": self.view.id(),
          }
          self.remove_selection("1") # in case it was expanded
          self.view.sel().clear()
          self.view.run_command("sublime_plumb", message)
  
subject: Move selection clearing to before running the action