public Builder mergeFrom(com.google.cloud.visionai.v1.NormalizedPolyline other) {
      if (other == com.google.cloud.visionai.v1.NormalizedPolyline.getDefaultInstance())
        return this;
      if (normalizedVerticesBuilder_ == null) {
        if (!other.normalizedVertices_.isEmpty()) {
          if (normalizedVertices_.isEmpty()) {
            normalizedVertices_ = other.normalizedVertices_;
            bitField0_ = (bitField0_ & ~0x00000001);
          } else {
            ensureNormalizedVerticesIsMutable();
            normalizedVertices_.addAll(other.normalizedVertices_);
          }
          onChanged();
        }
      } else {
        if (!other.normalizedVertices_.isEmpty()) {
          if (normalizedVerticesBuilder_.isEmpty()) {
            normalizedVerticesBuilder_.dispose();
            normalizedVerticesBuilder_ = null;
            normalizedVertices_ = other.normalizedVertices_;
            bitField0_ = (bitField0_ & ~0x00000001);
            normalizedVerticesBuilder_ =
                com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders
                    ? getNormalizedVerticesFieldBuilder()
                    : null;
          } else {
            normalizedVerticesBuilder_.addAllMessages(other.normalizedVertices_);
          }
        }
      }
      this.mergeUnknownFields(other.getUnknownFields());
      onChanged();
      return this;
    }
<pre>
Normalized Pplyline, which represents a curve consisting of connected
straight-line segments.
</pre>

Protobuf type {@code google.cloud.visionai.v1.NormalizedPolyline}
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/NormalizedPolyline.java