function shouldIgnoreValue(propertyInfo, value) {
	  return value == null || propertyInfo.hasBooleanValue && !value || propertyInfo.hasNumericValue && isNaN(value) || propertyInfo.hasPositiveNumericValue && value < 1 || propertyInfo.hasOverloadedBooleanValue && value === false;
	}
Creates markup for a property.

@param {string} name
@param {*} value
@return {?string} Markup string, or null if the property was invalid.