protect check_fn in normalizeTrialVariables
protect check_fn in normalizeTrialVariables
jodeleeuw/jsPsych,vergenzt/jsPsych,Scienthusiast/jsPsych,vergenzt/jsPsych,jspsych/jsPsych,wolfgangwalther/jsPsych,Scienthusiast/jsPsych,msrresearch/jsPsych,shamrt/jsPsych,andyh616/jsPsych,shamrt/jsPsych,erikasf/jsPsych,adrianoesch/jsPsych,jspsych/jsPsych,jspsych/jsPsych,jspsych/jsPsych,andyh616/jsPsych,erikasf/jsPsych,adrianoesch/jsPsych,wolfgangwalther/jsPsych