static void check ( boolean e ) {
  if ( ! e ) {
    throw new Error ( ) ;
  }
}

static void check ( boolean e ) { if ( ! e ) { throw new Error ( ) ; } }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (boolean_type) name: (identifier))) body: (block (if_statement condition: (parenthesized_expression (unary_expression operand: (identifier))) consequence: (block (throw_statement (object_creation_expression type: (type_identifier) arguments: (argument_list)))))))