public Builder clearPanAngle() {
      bitField0_ = (bitField0_ & ~0x00000010);
      panAngle_ = 0F;
      onChanged();
      return this;
    }
<pre>
Yaw angle, which indicates the leftward/rightward angle that the face is
pointing relative to the vertical plane perpendicular to the image. Range
[-180,180].
</pre>

<code>float pan_angle = 5;</code>

@return This builder for chaining.
java-vision/proto-google-cloud-vision-v1p4beta1/src/main/java/com/google/cloud/vision/v1p4beta1/FaceAnnotation.java