# getExtensionType method

FieldExtensionType getExtensionType()

Gets the the field extension type.

return The field extension type. throws BiosealException An error has occurred during Bioseal Library execution.

## Implementation

    FieldExtensionType getExtensionType() {
      Pointer<Int32> pExtensionType = calloc();
      try {
        var err = biosealSDK.id3BiosealField_GetExtensionType(_pHandle.value, pExtensionType);
        if (err != BiosealError.success.value) {
          throw BiosealException(err);
        }
        final vExtensionType = FieldExtensionTypeX.fromValue(pExtensionType.value);
        return vExtensionType;
      } finally {
        calloc.free(pExtensionType);
      }
    }