message: model_coverage_lib should be a py_library
diff: @@ -4,7 +4,7 @@ package(default_visibility = [
  licenses(["notice"]) # Apache 2.0
  -py_binary(
  +py_library(
  name = "model_coverage_lib",
  srcs = ["model_coverage_lib.py"],
  srcs_version = "PY2AND3",
  