https://pig.apache.org/docs/r0.14.0/api/org/apache/pig/newplan/logical/rules/MergeFilter.MergeFilterTransformer.html
MergeFilter.MergeFilterTransformer (Pig 0.14.0 API)
pigapi
https://pig.apache.org/docs/r0.14.0/api/org/apache/pig/newplan/logical/rules/MergeFilter.html
MergeFilter (Pig 0.14.0 API)
pigapi