Beam gRPC depedency tracing

[JDW J]

Team,

Consider me a newbie to Beam and Java world in general. I am trying to
trace Beam vendor dependency to gRPC-upstream.

  <modelVersion>4.0.0</modelVersion>
  <groupId>org.apache.beam</groupId>
  <artifactId>beam-vendor-grpc-1_26_0</artifactId>
  <version>0.3</version>
  <name>Apache Beam :: Vendored Dependencies :: gRPC :: 1.26.0</name>
  <url>http://beam.apache.org</url>


How can I tell what is the exact upstream repo for "<name>Apache Beam ::
Vendored Dependencies :: gRPC :: 1.26.0</name>" ?

-joji