@java.lang.Override
  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(username_)) {
      com.google.protobuf.GeneratedMessageV3.writeString(output, 1, username_);
    }
    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(password_)) {
      com.google.protobuf.GeneratedMessageV3.writeString(output, 2, password_);
    }
    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(vcenterIp_)) {
      com.google.protobuf.GeneratedMessageV3.writeString(output, 3, vcenterIp_);
    }
    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(thumbprint_)) {
      com.google.protobuf.GeneratedMessageV3.writeString(output, 4, thumbprint_);
    }
    getUnknownFields().writeTo(output);
  }
<pre>
The thumbprint representing the certificate for the vcenter.
</pre>

<code>string thumbprint = 4;</code>

@return The bytes for thumbprint.
java-vmmigration/proto-google-cloud-vmmigration-v1/src/main/java/com/google/cloud/vmmigration/v1/VmwareSourceDetails.java