How to place the Groovy in centralized Groovy Library and access that class from any script

I have the below Groovy script which i need to place it in centralized Groovy Library and then access the class mentioned in the Groovy from any script in my Ready API Project.

//Change the name of the Properties test step below
def step = context.testCase.testSteps['Properties']

//Parse the xml like you have in your script
def parsedXml = new XmlSlurper().parse(file)

//Get the all the error details from the response as map
def errorDetails = parsedXml.'**'.findAll { it.name() == 'IntegrationServiceErrorCode'}.inject([:]){map, entry ->    map[entry.ErrorCode.text()] = entry.Description.text(); map    }
log.info "Error details from response  : ${errorDetails}"

def failureMessage = new StringBuffer()

//Loop thru properties of Property step and check against the response
step.properties.keySet().each { key ->
   if (errorDetails.containsKey(key)) {
       step.properties[key]?.value == errorDetails[key] ?:  failureMessage.append("Response error code discription mismatch. expected [${step.properties[key]?.value}] vs actual [${errorDetails[key]}]")
   } else {
       failureMessage.append("Response does not have error code ${key}")
   }
}
if (failureMessage.toString()) {
  throw new Error(failureMessage.toString())
} 

Path: D:\GroovyLib\com\Linos\readyapi\util\property\propertyvalidation
File Name: PropertyValidation
I have just tried the code in Groovy Library.. Please correct this if wrong

package com.Linos.readyapi.util.property.propertyvalidation
import com.eviware.soapui.support.GroovyUtils
import groovy.lang.GroovyObject
import groovy.sql.Sql

class PropertyValidation
{
    def static propertystepvalidation()
{
//Change the name of the Properties test step below
def step = context.testCase.testSteps['Properties']

//Parse the xml like you have in your script
def parsedXml = new XmlSlurper().parse(file)

//Get the all the error details from the response as map
def errorDetails = parsedXml.'**'.findAll { it.name() == 'IntegrationServiceErrorCode'}.inject([:]){map, entry ->    map[entry.ErrorCode.text()] = entry.Description.text(); map    }
log.info "Error details from response  : ${errorDetails}"

def failureMessage = new StringBuffer()

//Loop thru properties of Property step and check against the response
step.properties.keySet().each { key ->
   if (errorDetails.containsKey(key)) {
       step.properties[key]?.value == errorDetails[key] ?:  failureMessage.append("Response error code discription mismatch. expected [${step.properties[key]?.value}] vs actual [${errorDetails[key]}]")
   } else {
       failureMessage.append("Response does not have error code ${key}")
   }
}
if (failureMessage.toString()) {
  throw new Error(failureMessage.toString())
} 

I am not sure what to mention in the def static method. I am new to this process and haven't done that yet. Can someone please guide me! I've read the documentation on Ready API! website. But I'm not clear on that.