Bedework: indexing related utility classes

<!-- https://jarcasting.com/artifacts/org.bedework/bw-util-indexing/ -->
<dependency>
    <groupId>org.bedework</groupId>
    <artifactId>bw-util-indexing</artifactId>
    <version>5.0.0</version>
</dependency>

// https://jarcasting.com/artifacts/org.bedework/bw-util-indexing/
implementation 'org.bedework:bw-util-indexing:5.0.0'

// https://jarcasting.com/artifacts/org.bedework/bw-util-indexing/
implementation ("org.bedework:bw-util-indexing:5.0.0")

'org.bedework:bw-util-indexing:jar:5.0.0'

<dependency org="org.bedework" name="bw-util-indexing" rev="5.0.0">
  <artifact name="bw-util-indexing" type="jar" />
</dependency>

@Grapes(
@Grab(group='org.bedework', module='bw-util-indexing', version='5.0.0')
)

libraryDependencies += "org.bedework" % "bw-util-indexing" % "5.0.0"

[org.bedework/bw-util-indexing "5.0.0"]