input: def port_java_to_python(java_code: str) -> str:
      """
      Ports a given Java code snippet to Python 3.
      
      >>> port_java_to_python("public class Foo { public int foo(int a, int b) { return a + b; } }")
      "def foo(a, b):\\n return a + b"
      """
output:     import re
  
      # Remove Java class declaration
      java_code = re.sub(r'public\s+class\s+\w+\s*\{', '', java_code)
      java_code = re.sub(r'\}\s*$', '', java_code)
  
      # Convert public methods to Python functions
      java_code = re.sub(r'public\s+(\w+)\s+(\w+)\s*\(([^)]*)\)\s*\{', r'def \2(\3):\n return', java_code)
  
      # Convert return statements
      java_code = re.sub(r'return\s+', '', java_code)
  
      # Remove semicolons
      java_code = re.sub(r';', '', java_code)
  
      # Remove remaining curly braces
      java_code = re.sub(r'\{', '', java_code)
      java_code = re.sub(r'\}', '', java_code)
  
      # Add indentation
      java_code = re.sub(r'\n', '\n    ', java_code)
  
      return java_code.strip()