private static long mod ( long num ) {
  return ( num % mod + mod ) % mod ;
}

private static long mod ( long num ) { return ( num % mod + mod ) % mod ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier))) body: (block (return_statement (binary_expression left: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (identifier)) right: (identifier))) right: (identifier)))))