static void printPermutation ( ) {
  permutation . stream ( ) . forEach ( ( i ) -> {
    System . out . print ( i + " " ) ;
  }
  ) ;
}

static void printPermutation ( ) { permutation . stream ( ) . forEach ( ( i ) -> { System . out . print ( i + " ▁ " ) ; } ) ; }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters) body: (block (expression_statement (method_invocation object: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)) name: (identifier) arguments: (argument_list (lambda_expression parameters: (inferred_parameters (identifier)) body: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (string_literal))))))))))))