@java.lang.Override
  public java.lang.String getRequisitionId() {
    java.lang.Object ref = requisitionId_;
    if (ref instanceof java.lang.String) {
      return (java.lang.String) ref;
    } else {
      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
      java.lang.String s = bs.toStringUtf8();
      requisitionId_ = s;
      return s;
    }
  }
<pre>
Required. The requisition ID, also referred to as the posting ID, is
assigned by the client to identify a job. This field is intended to be used
by clients for client identification and tracking of postings. A job isn't
allowed to be created if there is another job with the same
[company][google.cloud.talent.v4beta1.Job.name],
[language_code][google.cloud.talent.v4beta1.Job.language_code] and
[requisition_id][google.cloud.talent.v4beta1.Job.requisition_id].

The maximum number of allowed characters is 255.
</pre>

<code>string requisition_id = 3 [(.google.api.field_behavior) = REQUIRED];</code>

@return The requisitionId.
java-talent/proto-google-cloud-talent-v4beta1/src/main/java/com/google/cloud/talent/v4beta1/Job.java