public Builder addStartingUrlsBytes(com.google.protobuf.ByteString value) {
      if (value == null) {
        throw new NullPointerException();
      }
      checkByteStringIsUtf8(value);
      ensureStartingUrlsIsMutable();
      startingUrls_.add(value);
      bitField0_ |= 0x00000008;
      onChanged();
      return this;
    }
<pre>
Required. The starting URLs from which the scanner finds site pages.
</pre>

<code>repeated string starting_urls = 4 [(.google.api.field_behavior) = REQUIRED];</code>

@param value The bytes of the startingUrls to add.
@return This builder for chaining.
java-websecurityscanner/proto-google-cloud-websecurityscanner-v1beta/src/main/java/com/google/cloud/websecurityscanner/v1beta/ScanConfig.java