static long gcd ( long ar , long ar2 ) {
  if ( ar2 == 0 ) return ar ;
  else return gcd ( ar2 , ar % ar2 ) ;
}

static long gcd ( long ar , long ar2 ) { if ( ar2 == 0 ) return ar ; else return gcd ( ar2 , ar % ar2 ) ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier)) (formal_parameter type: (integral_type) name: (identifier))) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) consequence: (return_statement (identifier)) alternative: (return_statement (method_invocation name: (identifier) arguments: (argument_list (identifier) (binary_expression left: (identifier) right: (identifier))))))))