static int find_extra_element_index ( int [ ] arrA , int [ ] arrB ) {
  int extra_element = sum ( arrA ) - sum ( arrB ) ;
  return indexOf ( arrA , extra_element ) ;
}

static int find_extra_element_index ( int [ ] arrA , int [ ] arrB ) { int extra_element = sum ( arrA ) - sum ( arrB ) ; return indexOf ( arrA , extra_element ) ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (array_type element: (integral_type) dimensions: (dimensions)) name: (identifier)) (formal_parameter type: (array_type element: (integral_type) dimensions: (dimensions)) name: (identifier))) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (method_invocation name: (identifier) arguments: (argument_list (identifier))) right: (method_invocation name: (identifier) arguments: (argument_list (identifier)))))) (return_statement (method_invocation name: (identifier) arguments: (argument_list (identifier) (identifier))))))