ABAP: Get components of dynamic internal table

With ABAP 7.40 you can use the cast operator to get the components of a dynamic table in one line.

rt_components = CAST cl_abap_structdescr( CAST cl_abap_tabledescr( cl_abap_typedescr=>describe_by_data( lt_table ) )->get_table_line_type( ) )->get_components( ).
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