private com.google.protobuf.RepeatedFieldBuilderV3<
            com.google.cloud.visionai.v1.NormalizedVertex,
            com.google.cloud.visionai.v1.NormalizedVertex.Builder,
            com.google.cloud.visionai.v1.NormalizedVertexOrBuilder>
        getNormalizedVerticesFieldBuilder() {
      if (normalizedVerticesBuilder_ == null) {
        normalizedVerticesBuilder_ =
            new com.google.protobuf.RepeatedFieldBuilderV3<
                com.google.cloud.visionai.v1.NormalizedVertex,
                com.google.cloud.visionai.v1.NormalizedVertex.Builder,
                com.google.cloud.visionai.v1.NormalizedVertexOrBuilder>(
                normalizedVertices_,
                ((bitField0_ & 0x00000001) != 0),
                getParentForChildren(),
                isClean());
        normalizedVertices_ = null;
      }
      return normalizedVerticesBuilder_;
    }
<pre>
A sequence of vertices connected by straight lines.
</pre>

<code>repeated .google.cloud.visionai.v1.NormalizedVertex normalized_vertices = 1;</code>
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/NormalizedPolyline.java