code property
Failure code: SPEED_OUT_OF_RANGE (outside the published range),
SPEED_INCREMENT_INVALID (inside the range but off the 0.05
increment), SPEED_NOT_SUPPORTED (this model or language has no
runtime speed control), CONTROL_COMBINATION_INVALID (speed was set
while a buffered turn still carries a pronunciation control), or
INTERNAL_ERROR (server-side failure).
Implementation
final String code;