class_docstr: Most tests done in the base class LinearOperatorDerivedClassTest.
code: def test_empty_operators_raises(self):
      with self.assertRaisesRegex(ValueError, "non-empty"):
          linalg.LinearOperatorComposition([])
  
imports: import numpy
  from tensorflow.python.framework import config
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import math_ops
  from tensorflow.python.ops.linalg import linalg
  from tensorflow.python.ops.linalg import linear_operator_test_util
  from tensorflow.python.platform import test
label_desc: Use image node_id 10 for calling the SquareLinearOperatorCompositionTest obj's underlying member method code with example usage: obj.test_empty_operators_raises() without return types