def _find_missing(self, data, return_bool=False):
        """ ???

        Parameters
        ----------
        data            : pd.DataFrame()
            Input dataframe.
        return_bool     : bool
            ???

        Returns
        -------
        pd.DataFrame()
            ???

        """

        # This returns the full table with True where the condition is true
        if return_bool == False:
            data = self._find_missing_return_frame(data)
            return data

        # This returns a bool selector if any of the column is True
        elif return_bool == "any":
            bool_sel = self._find_missing_return_frame(data).any(axis=0)
            return bool_sel

        # This returns a bool selector if all of the column are True
        elif return_bool == "all":
            bool_sel = self._find_missing_return_frame(data).all(axis=0)
            return bool_sel
        
        else:
            print("error in multi_col_how input")
def _find_missing ( self , data , return_bool = False ) : if return_bool == False : data = self . _find_missing_return_frame ( data ) return data elif return_bool == "any" : bool_sel = self . _find_missing_return_frame ( data ) . any ( axis = 0 ) return bool_sel elif return_bool == "all" : bool_sel = self . _find_missing_return_frame ( data ) . all ( axis = 0 ) return bool_sel else : print ( "error in multi_col_how input" )
???

        Parameters
        ----------
        data            : pd.DataFrame()
            Input dataframe.
        return_bool     : bool
            ???

        Returns
        -------
        pd.DataFrame()
            ???