Call this function as an add-in to insert %in% at the cursor position.
rs_insert_infix_in(context = rs_get_context())(class document_context)
Object with context of active RStudio document.
Operator %in%.
Other 'Insert at cursor position' add-ins:
insert_magrittr_operators,
rs_enclose_with_percent(),
rs_insert_integer_division(),
rs_insert_matrix_multiplication(),
rs_insert_modulo()