filterHeaderTemplate:'<div class="ui-grid-filter-container" ng-repeat="colFilter in col.filters"><div my-custom-dropdown></div></div>',
// filterHeaderTemplate: '<div class="ui-grid-filter-container" ng-repeat="colFilter in col.filters"><div my-custom-dropdown></div></div>',
filter:{
// filter: {
term:'',
// term: '',
options:[{id:'Billable',value:'Billable'},{id:'Shadow',value:'Shadow'},{id:'NA',value:'NA'},{id:'Bench',value:'Bench'},{id:'Reserved',value:'Reserved'},{id:'UA',value:'Unassigned'},{id:'',value:'All'}]// custom attribute that goes with custom directive above