whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  1. TResult? $default(
    1. String from,
    2. String to,
    3. String value,
    4. String? gas,
    5. String? gasPrice,
    6. String? maxFeePerGas,
    7. String? maxPriorityFeePerGas,
    8. String? input,
    9. String? data,
    )?
)

A variant of when that fallback to returning null

It is equivalent to doing:

switch (sealedClass) {
  case Subclass(:final field):
    return ...;
  case _:
    return null;
}

Implementation

@optionalTypeArgs TResult? whenOrNull<TResult extends Object?>(TResult? Function( String from,  String to,  String value,  String? gas,  String? gasPrice,  String? maxFeePerGas,  String? maxPriorityFeePerGas,  String? input,  String? data)?  $default,) {final _that = this;
switch (_that) {
case _EvmTransactionParams() when $default != null:
return $default(_that.from,_that.to,_that.value,_that.gas,_that.gasPrice,_that.maxFeePerGas,_that.maxPriorityFeePerGas,_that.input,_that.data);case _:
  return null;

}
}