How do I restrict column filtering in Kendo UI grid to only allow the 'OR' operator? -

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in kendo ui grid have option set many attributes filter ui on each column. have column in grid defined follows:

{             field: 'task',             title: 'task',             width: 110,             filterable: {                 ui: tasksfilter,                 operators: {                     string: {                         eq: "is equal to"                     }                 }             }         }

i want user have 2 options joined dropdown can select "and" or "or" "or" valid option. there parameter in column definition allow me restrict user "or"?


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