code: def dual_class(self):
      return AKet
  
imports: from sympy.core.numbers import Float, I, Integer
  from sympy.matrices.dense import Matrix
  from sympy.external import import_module
  from sympy.testing.pytest import skip
  from sympy.physics.quantum.dagger import Dagger
  from sympy.physics.quantum.represent import represent, rep_innerproduct, rep_expectation, enumerate_states
  from sympy.physics.quantum.state import Bra, Ket
  from sympy.physics.quantum.operator import Operator, OuterProduct
  from sympy.physics.quantum.tensorproduct import TensorProduct
  from sympy.physics.quantum.tensorproduct import matrix_tensor_product
  from sympy.physics.quantum.commutator import Commutator
  from sympy.physics.quantum.anticommutator import AntiCommutator
  from sympy.physics.quantum.innerproduct import InnerProduct
  from sympy.physics.quantum.matrixutils import numpy_ndarray, scipy_sparse_matrix, to_numpy, to_scipy_sparse, to_sympy
  from sympy.physics.quantum.cartesian import XKet, XOp, XBra
  from sympy.physics.quantum.qapply import qapply
  from sympy.physics.quantum.operatorset import operators_to_state
  from sympy.testing.pytest import raises
label_desc: Use image node_id 1 for calling the ABra obj's underlying member method code with example usage: obj.dual_class() and returns: AKet