B2G/gecko/browser/components/tabview/modules/utils.jsm
// Returns true if the given object (r) looks like a <Range>.
Returns true if the given object (r) looks like a .
Returns true if the given object ( r ) looks like a .
function Utils_isRange(r) {
    return (r &&
            this.isNumber(r.min) &&
            this.isNumber(r.max));
  }
function Utils_isRange ( r ) { return ( r && this . isNumber ( r . min ) && this . isNumber ( r . max ) ) ; }
Returns true if the given object (r) looks like a <Range>.
Returns true if the given object ( r ) looks like a <Range > .