code: def test_package_name():
      expr = ast.NumVal(1)
  
      expected_code = """
  package foo.bar;
  public class Model {
      public static double score(double[] input) {
          return 1.0;
      }
  }
  """
  
      interpreter = JavaInterpreter(package_name="foo.bar")
      assert_code_equal(interpreter.interpret(expr), expected_code)
  
imports: from itertools import product
  import pytest
  from m2cgen import ast
  from m2cgen.interpreters import JavaInterpreter
  from tests.utils import assert_code_equal
label_desc: Use image node_id 6 for calling a global function with example usage: test_package_name() without return types