public Builder clearSourceProvider() {
      sourceProvider_ = getDefaultInstance().getSourceProvider();
      bitField0_ = (bitField0_ & ~0x00000800);
      onChanged();
      return this;
    }
<pre>
Output only. Source provider is the author of a public blueprint, from
which this blueprint is created.
</pre>

<code>string source_provider = 13 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>

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