Inserts a value into record in tbl.struct objects to control for when empty rows should be inserted into the data structure. NA's will be suppressed during presentation of the table.
| 1 | insert.grp1(obj, dx, lblescp, group = FALSE, val = NA, dx.up = FALSE)
 | 
| obj | vector or data frame | 
| dx | Index where NA is to be inserted | 
| lblescp | Label Escape, boolean | 
| group | indicates that this object is related to the grouping vector and the insetions must go after | 
| val | Values to be inserted | 
| dx.up | Bolean, If true adjust an index | 
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