asfimport opened a new issue, #427:
URL: https://github.com/apache/arrow-java/issues/427

   Vector classes contain private copies of each param in the `ArrowType`, but 
does not have any public api to access them.  So if given a vector you would 
have to get the `Field` from the and cast to the correct type.  For example, 
with a `TimeStampMicroTZVector` and trying to get the timezone:
   
   ```
   
   if field.getType.isInstanceOf[ArrowType.Timestamp] &&
             field.getType.asInstanceOf[ArrowType.Timestamp].getTimezone
   ```
   
   It would be more convenient to have direct accessors for these type params 
for the vector types that have parameters:
   
   - DecimalVector
   - FixedSizeBinaryVector
   - ListVector
   - TimeStamps with timezones
   - FixedSizedListVector
   - Unions
   
   
   **Reporter**: [Bryan 
Cutler](https://issues.apache.org/jira/browse/ARROW-1361) / @BryanCutler
   #### PRs and other links:
   - [GitHub Pull Request 
apache/arrow#972](https://github.com/apache/arrow/pull/972)
   
   <sub>**Note**: *This issue was originally created as 
[ARROW-1361](https://issues.apache.org/jira/browse/ARROW-1361). Please see the 
[migration documentation](https://github.com/apache/arrow/issues/14542) for 
further details.*</sub>


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