private void ensureAvailableCustomCoreCountsIsMutable() {
      if (!availableCustomCoreCounts_.isModifiable()) {
        availableCustomCoreCounts_ = makeMutableCopy(availableCustomCoreCounts_);
      }
      bitField0_ |= 0x00000080;
    }
<pre>
Output only. The amount of storage available, defined in GB.
</pre>

<code>int32 disk_size_gb = 8 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>

@return This builder for chaining.
java-vmwareengine/proto-google-cloud-vmwareengine-v1/src/main/java/com/google/cloud/vmwareengine/v1/NodeType.java