public Builder clearServiceAttachment() {
      serviceAttachment_ = getDefaultInstance().getServiceAttachment();
      bitField0_ = (bitField0_ & ~0x00000040);
      onChanged();
      return this;
    }
<pre>
Required. The service attachment which is the target of the PSC connection,
in the form of
projects/{project-id}/regions/{region}/serviceAttachments/{service-attachment-id}.
</pre>

<code>
string service_attachment = 6 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
</code>

@return This builder for chaining.
java-valkey/proto-google-cloud-valkey-v1/src/main/java/com/google/cloud/memorystore/v1/PscConnection.java