tree ca32f7174ced9e777306f17be6eb1edd6c7090ec
parent 2ec8f28cf6b5c8f2c64d2d82f2cc4664f93150d0
author Taegeon Um <taegeonum@gmail.com> 1536817959 +0900
committer John Yang <johnyangk@gmail.com> 1536817959 +0900

[NEMO-217] Immediately emits elements in FlattenTransform (#120)

JIRA: [NEMO-217: Immediately emits elements in FlattenTransform](https://issues.apache.org/jira/projects/NEMO/issues/NEMO-217)

**Major changes:**
- remove `ArrayList` that collects elements in `FlattenTransform` and directly emit the elements

**Minor changes to note:**
- 

**Tests for the changes:**
- 

**Other comments:**
- 

Closes #120