code: def setValue(self, value):
      self._value = value
      self.widget.setText(str(value))
  
file_path: pyqtgraph/pyqtgraph/parametertree/parameterTypes/file.py
imports: import os
  import re
  from ...Qt import QtCore, QtGui, QtWidgets
  from ..Parameter import Parameter
  from .str import StrParameterItem
label_desc: Use image node_id 4 for calling the FileParameterItem obj's underlying member method code with example usage: obj.setValue(value) without return types