<dependency>
  <groupId>org.hsqldb</groupId>
  <artifactId>hsqldb</artifactId>
  <version>2.6.1</version>
</dependency>

implementation 'org.hsqldb:hsqldb:2.6.1'

implementation("org.hsqldb:hsqldb:2.6.1")

libraryDependencies += "org.hsqldb" % "hsqldb" % "2.6.1"

@Grapes(
  @Grab(group='org.hsqldb', module='hsqldb', version='2.6.1')
)

<dependency org="org.hsqldb" name="hsqldb" rev="2.6.1" />

[org.hsqldb/hsqldb "2.6.1"]

'org.hsqldb:hsqldb:jar:2.6.1'