Hi @Douglas_SIlva_Ramos
I am facing the similar kind of issue for my toggle button testing Toggle button
I have tried your solution by adding the custom keyword with the given JS
Code:
CustomKeywords.'com.example.WebUIKeywords.clickUsingJS'(findTestObject('Page_Add Address/MailOption'), 10)
Now i am getting
2019-06-24 12:36:10.195 ERROR k.k.c.m.CustomKeywordDelegatingMetaClass - 
com.example.WebUIKeywords
2019-06-24 12:36:10.196 ERROR c.k.katalon.core.main.TestCaseExecutor - Test Cases/Emma_AddNewClient/Add_New_client_Step1_Debugt FAILED.
Reason:
java.lang.ClassNotFoundException: com.example.WebUIKeywords
at com.kms.katalon.core.main.CustomKeywordDelegatingMetaClass.getCustomKeywordClassAndSetMetaClass(CustomKeywordDelegatingMetaClass.java:100)
at com.kms.katalon.core.main.CustomKeywordDelegatingMetaClass.invokeStaticMethod(CustomKeywordDelegatingMetaClass.java:45)
at Add_New_client_Step1_Debugt.run(Add_New_client_Step1_Debugt:95)
at com.kms.katalon.core.main.ScriptEngine.run(ScriptEngine.java:194)
at com.kms.katalon.core.main.ScriptEngine.runScriptAsRawText(ScriptEngine.java:119)
at com.kms.katalon.core.main.TestCaseExecutor.runScript(TestCaseExecutor.java:337)
at com.kms.katalon.core.main.TestCaseExecutor.doExecute(TestCaseExecutor.java:328)
at com.kms.katalon.core.main.TestCaseExecutor.processExecutionPhase(TestCaseExecutor.java:307)
at com.kms.katalon.core.main.TestCaseExecutor.accessMainPhase(TestCaseExecutor.java:299)
at com.kms.katalon.core.main.TestCaseExecutor.execute(TestCaseExecutor.java:233)
at com.kms.katalon.core.main.TestSuiteExecutor.accessTestCaseMainPhase(TestSuiteExecutor.java:133)
at com.kms.katalon.core.main.TestSuiteExecutor.accessTestSuiteMainPhase(TestSuiteExecutor.java:116)
at com.kms.katalon.core.main.TestSuiteExecutor.execute(TestSuiteExecutor.java:83)
at com.kms.katalon.core.main.TestCaseMain.startTestSuite(TestCaseMain.java:157)
at com.kms.katalon.core.main.TestCaseMain$startTestSuite$0.call(Unknown Source)
at TempTestSuite1561376149335.run(TempTestSuite1561376149335.groovy:35)
Please do the needful …