I have one controller and one VF page.I am getting error saying "Unknown property 'Multipicklist.getPicklistValues'" for VF page.Dont know why it is.

Controller:

```
     global class Multipicklist {

    global list<SelectOption> picklistValues{get;set;}
    SObject Account;
    String Dummy='Dummy__c';
    global  Multipicklist(){

  list<SelectOption> picklistValues = new list<SelectOption>();
  // Get the object type of the SObject.
  Schema.sObjectType objType = Account.getSObjectType(); 
  // Describe the SObject using its object type.
  Schema.DescribeSObjectResult objDescribe = objType.getDescribe();       
  // Get a map of fields for the SObject
  map<String, Schema.SObjectField> fieldMap = objDescribe.fields.getMap(); 
  // Get the list of picklist values for this field.
  list<Schema.PicklistEntry> values =
     fieldMap.get(Dummy).getDescribe().getPickListValues();
        System.debug('value of values :::'+values);
  // Add these values to the selectoption list.
  for (Schema.PicklistEntry a : values)
  { 
     picklistValues.add(new SelectOption(a.getLabel(), a.getValue())); 
      System.debug('value of picklist added :::'+picklistValues);
  }

 }
}

```

VF Page:

```
    <apex:page controller="Multipicklist" >
    <apex:form>
        <apex:pageblock>
    <apex:selectCheckboxes border="3">
    <apex:selectOptions value="{!PicklistValues}"></apex:selectOptions>
</apex:selectCheckboxes>
            </apex:pageblock>
        </apex:form>
</apex:page>

```