private com.google.protobuf.SingleFieldBuilderV3<
            com.google.type.LatLng, com.google.type.LatLng.Builder, com.google.type.LatLngOrBuilder>
        getStartCoordinatesFieldBuilder() {
      if (startCoordinatesBuilder_ == null) {
        startCoordinatesBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.type.LatLng,
                com.google.type.LatLng.Builder,
                com.google.type.LatLngOrBuilder>(
                getStartCoordinates(), getParentForChildren(), isClean());
        startCoordinates_ = null;
      }
      return startCoordinatesBuilder_;
    }
<pre>
Required. The latitude and longitude of the location to calculate the
commute time from.
</pre>

<code>.google.type.LatLng start_coordinates = 2 [(.google.api.field_behavior) = REQUIRED];
</code>
java-talent/proto-google-cloud-talent-v4/src/main/java/com/google/cloud/talent/v4/CommuteFilter.java