src/parser.js
function validateProp(key, value) {
    switch (key) {
    case "each":
        return Extender.validateEach(value);
    case "if":
    case "fi":
        return Extender.validateExpr(value);
    default:
        return true;
    }
}
function validateProp(key, value) {
    switch (key) {
    case "each":
        return Extender.validateEach(value);
    case "if":
    case "fi":
        return Extender.validateExpr(value);
    default:
        return true;
    }
}
function validateProp ( key , value ) { switch ( key ) { case "each" : return Extender . validateEach ( value ) ; case "if" : case "fi" : return Extender . validateExpr ( value ) ; default : return true ; } }
(string, string) => boolean
( string string ) = > boolean