import com.atlassian.jira.ComponentManager;

import com.atlassian.jira.issue.fields.FieldManager;

import com.atlassian.jira.issue.fields.CustomField;

import com.atlassian.jira.issue.fields.layout.field.FieldLayoutManager;

import com.atlassian.jira.issue.fields.layout.field.FieldLayoutItem;

import com.atlassian.jira.issue.fields.layout.field.EditableFieldLayout;



//*** Initialize Output ***

String result = "";



//*** Get Needed Managers ***

ComponentManager   componentManager = ComponentManager.getInstance();

FieldLayoutManager layoutManager    = componentManager.getFieldLayoutManager();

FieldManager       fieldManager     = componentManager.getFieldManager();



//*** Lookup Field Layout ***

EditableFieldLayout layout = layoutManager.getEditableFieldLayout(10000);

log.debug(layout)



//*** Lookup Custom Field ***

CustomField     field = fieldManager.getCustomField('customfield_10042');

FieldLayoutItem item  = layout.getFieldLayoutItem(field);



log.debug(item)





//*** Record Old Description

result += "Old Description:\n----------------\n"

result += item.getFieldDescription();

result += "\n\n";





//*** Update Field Description ***

layout.setDescription(item,"SSSSew Field Description");

layoutManager.storeEditableFieldLayout(layout)





//*** Record New Description ***

result += "SSSNew Description:\n----------------\n";

result += item.getFieldDescription();

result += "\n\n";



return result;