public Builder setRequisitionIdBytes(com.google.protobuf.ByteString value) {
      if (value == null) {
        throw new NullPointerException();
      }
      checkByteStringIsUtf8(value);
      requisitionId_ = value;
      bitField0_ |= 0x00000004;
      onChanged();
      return this;
    }
<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>

@param value The bytes for requisitionId to set.
@return This builder for chaining.
java-talent/proto-google-cloud-talent-v4beta1/src/main/java/com/google/cloud/talent/v4beta1/Job.java