<dependency>
  <groupId>javax.portlet</groupId>
  <artifactId>portlet-api</artifactId>
  <version>2.0</version>
</dependency>

implementation 'javax.portlet:portlet-api:2.0'

implementation("javax.portlet:portlet-api:2.0")

libraryDependencies += "javax.portlet" % "portlet-api" % "2.0"

@Grapes(
  @Grab(group='javax.portlet', module='portlet-api', version='2.0')
)

<dependency org="javax.portlet" name="portlet-api" rev="2.0" />

[javax.portlet/portlet-api "2.0"]

'javax.portlet:portlet-api:jar:2.0'