private static long gcd ( Long m , long n ) {
  if ( m < n ) {
    return gcd ( n , m ) ;
  }
  if ( n == 0 ) {
    return m ;
  }
  return gcd ( n , m % n ) ;
}

private static long gcd ( Long m , long n ) { if ( m < n ) { return gcd ( n , m ) ; } if ( n == 0 ) { return m ; } return gcd ( n , m % n ) ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (type_identifier) name: (identifier)) (formal_parameter type: (integral_type) name: (identifier))) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) consequence: (block (return_statement (method_invocation name: (identifier) arguments: (argument_list (identifier) (identifier)))))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) consequence: (block (return_statement (identifier)))) (return_statement (method_invocation name: (identifier) arguments: (argument_list (identifier) (binary_expression left: (identifier) right: (identifier)))))))