@java.lang.Override
      public com.google.protobuf.Duration getValidAfterDuration() {
        if (validAfterDurationBuilder_ == null) {
          if (startTimingConstraintsCase_ == 3) {
            return (com.google.protobuf.Duration) startTimingConstraints_;
          }
          return com.google.protobuf.Duration.getDefaultInstance();
        } else {
          if (startTimingConstraintsCase_ == 3) {
            return validAfterDurationBuilder_.getMessage();
          }
          return com.google.protobuf.Duration.getDefaultInstance();
        }
      }
<pre>
A relative time after which resources may be created.
</pre>

<code>.google.protobuf.Duration valid_after_duration = 3;</code>

@return The validAfterDuration.
java-tpu/proto-google-cloud-tpu-v2alpha1/src/main/java/com/google/cloud/tpu/v2alpha1/QueuedResource.java