static void rotate180 ( int arr [ ] [ ] ) {
  transpose ( arr ) ;
  reverseColumns ( arr ) ;
  transpose ( arr ) ;
  reverseColumns ( arr ) ;
}

static void rotate180 ( int arr [ ] [ ] ) { transpose ( arr ) ; reverseColumns ( arr ) ; transpose ( arr ) ; reverseColumns ( arr ) ; }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier) dimensions: (dimensions))) body: (block (expression_statement (method_invocation name: (identifier) arguments: (argument_list (identifier)))) (expression_statement (method_invocation name: (identifier) arguments: (argument_list (identifier)))) (expression_statement (method_invocation name: (identifier) arguments: (argument_list (identifier)))) (expression_statement (method_invocation name: (identifier) arguments: (argument_list (identifier))))))