code: def test_unsupported_exprs():
      interpreter = RInterpreter()
  
      expr = ast.Expr()
      with pytest.raises(
          NotImplementedError, match="No handler found for 'Expr'"
      ):
          interpreter.interpret(expr)
  
imports: from itertools import product
  import pytest
  from m2cgen import ast
  from m2cgen.interpreters import RInterpreter
  from tests.utils import assert_code_equal
label_desc: Use image node_id 26 for calling a global function with example usage: test_unsupported_exprs() without return types