debug_toolbar/panels/__init__.py
def is_historical(self):
        """
        Panel supports rendering historical values.

        Defaults to :attr:`has_content`.
        """
        return self.has_content

        Panel supports rendering historical values.

        Defaults to :attr:`has_content`.
        
Panel supports rendering historical values.
Panel supports rendering historical values .
def is_historical(self):
        return self.has_content
def is_historical ( self ) : return self . has_content
Panel supports rendering historical values.
Panel supports rendering historical values .
"""
        Panel supports rendering historical values.

        Defaults to :attr:`has_content`.
        """
self