ALV - set_text in column header not working (or I'm doing something wrong)

In the WDDOINIT module of my view that contains the ALV, I have the code:
method wddoinit .
data: l_ref_cmp_usage type ref to if_wd_component_usage,
        lr_column        type ref to cl_salv_wd_column,
        lr_column_header type ref to cl_salv_wd_column_header.
l_ref_cmp_usage = wd_this->wd_cpuse_alv( ).
if l_ref_cmp_usage->has_active_component( ) is initial.
    l_ref_cmp_usage->create_component( ).
endif.
data: l_ref_interfacecontroller type ref to iwci_salv_wd_table .
l_ref_interfacecontroller =   wd_this->wd_cpifc_alv( ).
data: l_value type ref to cl_salv_wd_config_table.
l_value = l_ref_interfacecontroller->get_model( ).
lr_column = l_value->if_salv_wd_column_settings~get_column( 'LASTDATE' ).
lr_column_header = lr_column->get_header( ).
data: l_column_text type string.
l_column_text = 'Must Change By'.
lr_column_header->set_text( l_column_text ).
endmethod.
The text in the column header does not change. It uses what is in the dictionary.

Try setting the set_ddic_binding_field( '00' ).

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ALV - set_text in column header not working (or I'm doing something wrong)

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