How to use the moddle.coerceType function in moddle

} else {
        // IDREFS: parse references as whitespace-separated list
        values = value.split(' ');

        forEach(values, function(v) {
          context.addReference({
            element: instance,
            property: prop.ns.name,
            id: v
          });
        });
      }

    } else {
      if (prop) {
        value = coerceType(prop.type, value);
      } else
      if (name !== 'xmlns') {
        propNameNs = parseNameNS(name, descriptor.ns.prefix);

        // check whether attribute is defined in a well-known namespace
        // if that is the case we emit a warning to indicate potential misuse
        if (model.getPackage(propNameNs.prefix)) {

          context.addWarning({
            message: 'unknown attribute <' + name + '>',
            element: instance,
            property: name,
            value: value
          });
        }
      }

ElementHandler.prototype.handleEnd = function() {

  var value = this.body,
      element = this.element,
      descriptor = getModdleDescriptor(element),
      bodyProperty = descriptor.bodyProperty;

  if (bodyProperty && value !== undefined) {
    value = coerceType(bodyProperty.type, value);
    element.set(bodyProperty.name, value);
  }
};

ValueHandler.prototype.handleEnd = function() {

  var value = this.body || '',
      element = this.element,
      propertyDesc = this.propertyDesc;

  value = coerceType(propertyDesc.type, value);

  if (propertyDesc.isMany) {
    element.get(propertyDesc.name).push(value);
  } else {
    element.set(propertyDesc.name, value);
  }
};