static void printSubSets ( int numOfBits , int num ) {
  if ( num >= 0 ) {
    System . out . print ( "{ " ) ;
    subset ( numOfBits - 1 , num , numOfBits ) ;
    System . out . println ( "}" ) ;
    printSubSets ( numOfBits , num - 1 ) ;
  }
  else return ;
}

static void printSubSets ( int numOfBits , int num ) { if ( num >= 0 ) { System . out . print ( " { ▁ " ) ; subset ( numOfBits - 1 , num , numOfBits ) ; System . out . println ( " } " ) ; printSubSets ( numOfBits , num - 1 ) ; } else return ; }
(method_declaration (modifiers) type: (void_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: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_literal)))) (expression_statement (method_invocation name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (decimal_integer_literal)) (identifier) (identifier)))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_literal)))) (expression_statement (method_invocation name: (identifier) arguments: (argument_list (identifier) (binary_expression left: (identifier) right: (decimal_integer_literal)))))) alternative: (return_statement))))