code: def asi8(self):
      # do not cache or you'll create a memory leak
      return self.values.view("i8")
  
imports: import warnings
  import numpy
  from pandas._libs import index
  import pandas.compat
  from pandas.util._decorators import Appender, cache_readonly
  from pandas.core.dtypes.common import is_bool, is_bool_dtype, is_dtype_equal, is_extension_array_dtype, is_float, is_integer_dtype, is_scalar, needs_i8_conversion, pandas_dtype
  import pandas.core.dtypes.concat
  from pandas.core.dtypes.missing import isna
  from pandas.core import algorithms
  import pandas.core.common
  import pandas.core.indexes.base
  from pandas.core.indexes.base import Index, InvalidIndexError, _index_shared_docs
  from pandas.core.ops import get_op_result_name
label_desc: Use image node_id 2 for calling the Int64Index obj's underlying member method code with example usage: obj.asi8() and returns: self