MarkupBuilder in Eclipse: unable to resolve class groovy.xml.markupBuilder - groovy

Question

I feel a bit silly for making this question, but I'm out of options.
Basically, I have this on a "let's learn groovy" project:
package com.mypackage.markupexercise
import groovy.xml.MarkupBuilder
println "Hello MarkupBuilder"
def writer = new StringWriter()
def builder = new MarkupBuilder(writer)
builder.records() {
example(id:1)
}
And I'm getting the following compilation error:
<path>\markupbuilderexercise\Main.groovy: 3: unable to resolve class groovy.xml.MarkupBuilder
# line 3, column 1.
import groovy.xml.MarkupBuilder
^
1 error
Now, I've seen [this question][1], and I have imported the groovy-xml-3.09.jar file (Through right click on project -> Properties -> Java Build Path -> Add Jars...)
There is nothing on the "Problems" tab, and if I try to run through the groovy console, I get the following error:
groovy.lang.MissingMethodException: No signature of method: groovy.xml.MarkupBuilder.records() is applicable for argument types: (com.neuro.groovyhelloworld.markupbuilderexercise.Main$_run_closure1) values: [com.neuro.groovyhelloworld.markupbuilderexercise.Main$_run_closure1#2e757861]
at com.neuro.groovyhelloworld.markupbuilderexercise.Main.run(Main.groovy:10)
at com.neuro.groovyhelloworld.markupbuilderexercise.Main.main(Main.groovy)
My take here is that I'm not adding the dependency in the right way, but I'm a Java developer and dependencies were either what I've done or just relying on Maven/Gradle, so I'm kind of out of ideas here.
What am I missing?
[1]: https://stackoverflow.com/questions/59132101/eclipse-groovy-unable-to-resolve-class

Answer 1

I see the same issue when choosing Run As > Groovy Console and then running the script. It does work fine for Run As > Groovy Script on the following source -- I used grab so I didn't need to add groovy-xml to my project's classpath:
#Grab('org.codehaus.groovy:groovy-xml:3.0.9')
import groovy.xml.MarkupBuilder
def writer = new StringWriter()
new MarkupBuilder(writer).tap {
records {
example(id:1)
}
}
print writer
I get the following output:
<records>
<example id='1' />
</records>
You can also build the project and run the script using Run As > Java Application.