Instance Properties
defaultTextString. Default text. Valid for "select" type only.
typeString. Editor type. Value could be
"text" - Text box
"select" - Drop down list
"date" - Date picker
validRuleArray. Valid rules. Array element could be
'R' - Required
'N' - Number
'E' - Email
'F' - Float
Sample - Cell in this column must have a valid email address.
validRule: ['R','E']