InternalBuild a filter function to get a substring starting from a designated position. Evaluates to string.
The string to get a substring from. This can either be a string, a reference to a field or another filter function.
The starting position of the substring. This can be either a number, a reference to a field or another filter function.
Optionallen: number | Field<EntityT, boolean, boolean> | NumberFilterFunction<EntityT>The length of the substring. This can be either a number, a reference to a field or another filter function.
The newly created filter function
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Export substring filter function for backwards compatibility.