public Builder clearDriveName() {
        if (driveSourceCase_ == 7) {
          driveSourceCase_ = 0;
          driveSource_ = null;
          onChanged();
        }
        return this;
      }
<pre>
The name of the drive to download from.
</pre>

<code>string drive_name = 7;</code>

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