private static BigInteger cube ( int x ) {
  return BigInteger . valueOf ( x ) . pow ( 3 ) ;
}

private static BigInteger cube ( int x ) { return BigInteger . valueOf ( x ) . pow ( 3 ) ; }
(method_declaration (modifiers) type: (type_identifier) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier))) body: (block (return_statement (method_invocation object: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))) name: (identifier) arguments: (argument_list (decimal_integer_literal))))))