This file is indexed.

/usr/lib/R/site-library/XMLRPC/INDEX is in r-omegahat-xmlrpc 0.3-0-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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XMLRPCServer            Create an instance of an XMLRPCServer object
rpc.serialize           Serialize R objects to XML-RPC format
xml.rpc                 Invoke XML-RPC method from R