static void displayList ( Node node ) {
  Node start = node ;
  while ( node . next != start ) {
    System . out . print ( " " + node . data ) ;
    node = node . next ;
  }
  System . out . print ( " " + node . data ) ;
}

static void displayList ( Node node ) { Node start = node ; while ( node . next != start ) { System . out . print ( " ▁ " + node . data ) ; node = node . next ; } System . out . print ( " ▁ " + node . data ) ; }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (type_identifier) name: (identifier))) body: (block (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (identifier))) (while_statement condition: (parenthesized_expression (binary_expression left: (field_access object: (identifier) field: (identifier)) right: (identifier))) body: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (binary_expression left: (string_literal) right: (field_access object: (identifier) field: (identifier)))))) (expression_statement (assignment_expression left: (identifier) right: (field_access object: (identifier) field: (identifier)))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (binary_expression left: (string_literal) right: (field_access object: (identifier) field: (identifier))))))))