How to write a reusable script Library

I've found the need to define a common Library of reusable Groovy Scripts for use with SOAPUI community edition, there isn't a tutorial or established examples on how this can be achieved so here is an example of how I did this.

1) Define a new TestSuite in the root of your project called Library.
2) Disable the Library TestSuite so that it doesn't get run in an uncontrolled manner.
3) Define a TestCase under Library, I name this after the module-name.
4) Define a Groovy Script, I give this the name of the Groovy Class that is going to contain my reusable code.

class Example {
 def log
 def context
 def testRunner
 // Class constructor with same case as Class name
 def Example(logIn,contextIn,testRunnerIn) {
  this.log = logIn
  this.context = contextIn
  this.testRunner = testRunnerIn
 }
}

5) Add the reusable code as method, pass parameters as necessary.

def execute(message) {
      // do some stuff to prove I've run with right context, etc.
      log.info testRunner
      log.info context
      log.info "return "+message
      return message
 }

6) We need to instance of the class; add the following to the end of the Script, outside the class definition. This will place the instance in the project's context.

context.setProperty( "example", new Example( log, context, testRunner) )
log.info "Library Context:"+context

7) You can now reuse the instance in any Groovy Script, with the following Groovy code.

// get a reference to the library TestSuite
library = testRunner.testCase.testSuite.project.testSuites["Library"]

// find the module within the library 
module = library.testCases["module-name"].testSteps["Example"]

// initialise the library; which places an instance of Example in the context
module.run(testRunner, context)

// get the instance of example from the context.
def example = context.example

// run the method, with parameter
log.info "example.execute() = " + example.execute("Tester")

😎 Add more modules, classes or methods as necessary.
9) The instance can be added to the Global context if you want to use it across SOAPUI projects.