public Builder clearBootDiskType() {
      bootDiskType_ = getDefaultInstance().getBootDiskType();
      bitField0_ = (bitField0_ & ~0x00000001);
      onChanged();
      return this;
    }
<pre>
Type of the boot disk (default is "pd-ssd").
Valid values: "pd-ssd" (Persistent Disk Solid State Drive) or
"pd-standard" (Persistent Disk Hard Disk Drive).
</pre>

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

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