code: def coefficients(self):
          
          vector = self.get_parameter_vector(include_frozen=True)
          pars = self.get_all_coefficients(vector)
          if len(pars) != 6:
              raise ValueError("there must be 6 coefficient blocks")
          if any(len(p.shape) != 1 for p in pars):
              raise ValueError("coefficient blocks must be 1D")
          if len(pars[0]) != len(pars[1]):
              raise ValueError("coefficient blocks must have the same shape")
          if any(len(pars[2]) != len(p) for p in pars[3:]):
              raise ValueError("coefficient blocks must have the same shape")
          return pars
docs: All of the coefficient arrays
  
          This property is the concatenation of the results from
          :func:`terms.Term.get_real_coefficients` and
          :func:`terms.Term.get_complex_coefficients` but it will always return
          a tuple of length 6, even if ``alpha_complex_imag`` was omitted from
          ``get_complex_coefficients``.
  
          Returns:
              (array[j_real], array[j_real], array[j_complex], array[j_complex],
              array[j_complex], array[j_complex]): ``alpha_real``, ``beta_real``,
              ``alpha_complex_real``, ``alpha_complex_imag``,
              ``beta_complex_real``, and ``beta_complex_imag`` as described
              above.
  
          Raises:
              ValueError: For invalid dimensions for the coefficients.