public Builder clearDiskType() {
      diskType_ = getDefaultInstance().getDiskType();
      bitField0_ = (bitField0_ & ~0x00000001);
      onChanged();
      return this;
    }
<pre>
Type of the disk (default is "pd-standard").
Valid values: "pd-ssd" (Persistent Disk Solid State Drive)
"pd-standard" (Persistent Disk Hard Disk Drive)
"pd-balanced" (Balanced Persistent Disk)
"pd-extreme" (Extreme Persistent Disk)
</pre>

<code>string disk_type = 1;</code>

@return This builder for chaining.
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/PersistentDiskSpec.java