static void reverse ( ) {
  if ( st . size ( ) > 0 ) {
    char x = st . peek ( ) ;
    st . pop ( ) ;
    reverse ( ) ;
    insert_at_bottom ( x ) ;
  }
}

static void reverse ( ) { if ( st . size ( ) > 0 ) { char x = st . peek ( ) ; st . pop ( ) ; reverse ( ) ; insert_at_bottom ( x ) ; } }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)) right: (decimal_integer_literal))) consequence: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))) (expression_statement (method_invocation name: (identifier) arguments: (argument_list))) (expression_statement (method_invocation name: (identifier) arguments: (argument_list (identifier))))))))