1<cfcomponent>
2
3	<cffunction name="init" access="public" returntype="any">
4		<cfargument name="arg1" type="any" required="true">
5		<cfset this.myVariable = arguments.arg1>
6
7		<cfreturn this>
8	</cffunction>
9
10	<cffunction name="testFunc" access="private" returntype="void">
11		<cfargument name="arg1" type="any" required="false">
12
13		<cfif structKeyExists(arguments, "arg1")>
14			<cfset writeoutput("Argument exists")>
15		</cfif>
16	</cffunction>
17
18</cfcomponent>