Added an exception to warn when a method is called on an unitialized element
Added an exception to warn when a method is called on an unitialized element

MIKUScallion/tooltipster_cn,cswef/tooltipster_cn,trusktr/tooltipster,trusktr/tooltipster,andersonunsonst/tooltipster,MIKUScallion/tooltipster_cn,andersonunsonst/tooltipster,iamceege/tooltipster,iamceege/tooltipster,cswef/tooltipster_cn