<dependency>
  <groupId>hsqldb</groupId>
  <artifactId>hsqldb</artifactId>
  <version>1.6.1</version>
</dependency>

implementation 'hsqldb:hsqldb:1.6.1'

implementation("hsqldb:hsqldb:1.6.1")

libraryDependencies += "hsqldb" % "hsqldb" % "1.6.1"

@Grapes(
  @Grab(group='hsqldb', module='hsqldb', version='1.6.1')
)

<dependency org="hsqldb" name="hsqldb" rev="1.6.1" />

[hsqldb/hsqldb "1.6.1"]

'hsqldb:hsqldb:jar:1.6.1'