input: Write a function to port a given Java code snippet to Python 3. The function should take the Java code as input and return the equivalent Python code. 
  
  def port_java_to_python(java_code):
      # Convert the Java code to Python 3 code
      return python_code
  
  # Test cases
  assert port_java_to_python("public class Foo { public int foo(int a, int b) { return a + b; } }") == "class Foo:\n def foo(a, b):\n return a + b"
  assert port_java_to_python("public class Bar { public int bar(int x) { return x * 2; } }") == "class Bar:\n def bar(x):\n return x * 2"
  assert port_java_to_python("") == ""
  assert port_java_to_python("public class Baz { public void baz() { System.out.println('Hello'); } }") == "class Baz:\n def baz():\n print('Hello')"
output: def port_java_to_python(java_code):
      if not java_code:
          return ""
      java_code = java_code.replace("public ", "")
      java_code = java_code.replace("int ", "")
      java_code = java_code.replace("void ", "")
      java_code = java_code.replace("System.out.println", "print")
      java_code = java_code.replace("{", ":")
      java_code = java_code.replace("}", "")
      java_code = java_code.replace(";", "")
      java_code = java_code.replace("class ", "class ")
      java_code = java_code.replace("public", "")
      java_code = java_code.replace("return ", "return ")
      return java_code