@classmethod<EOL><INDENT>def _get_block_manager_axis(cls, axis):<DEDENT>
axis = cls._get_axis_number(axis)<EOL>if cls._AXIS_REVERSED:<EOL><INDENT>m = cls._AXIS_LEN - <NUM_LIT:1><EOL>return m - axis<EOL><DEDENT>return axis<EOL>
Map the axis to the block_manager axis.