static boolean isDivisibleBy20 ( char bin [ ] , int n ) {
  if ( bin [ n - 1 ] == '1' ) return false ;
  return isDivisibleBy10 ( bin , n - 1 ) ;
}

static boolean isDivisibleBy20 ( char bin [ ] , int n ) { if ( bin [ n - 1 ] == '1' ) return false ; return isDivisibleBy10 ( bin , n - 1 ) ; }
(method_declaration (modifiers) type: (boolean_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier) dimensions: (dimensions)) (formal_parameter type: (integral_type) name: (identifier))) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (array_access array: (identifier) index: (binary_expression left: (identifier) right: (decimal_integer_literal))) right: (character_literal))) consequence: (return_statement (false))) (return_statement (method_invocation name: (identifier) arguments: (argument_list (identifier) (binary_expression left: (identifier) right: (decimal_integer_literal)))))))