class_docstr: QWidget wrapper for :class:`~pyqtgraph.HistogramLUTItem`.
  
  All parameters are passed along in creating the HistogramLUTItem.
code: def __getattr__(self, attr):
      return getattr(self.item, attr)
  
file_path: pyqtgraph/pyqtgraph/widgets/HistogramLUTWidget.py
imports: from ..graphicsItems.HistogramLUTItem import HistogramLUTItem
  from ..Qt import QtCore, QtWidgets
  from .GraphicsView import GraphicsView
label_desc: Use image node_id 3 for calling the HistogramLUTWidget obj's underlying member method code with example usage: obj.__getattr__(attr) and returns: getattr