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CHECK_30 - EXPORTING can be omitted

When calling methods with functional writing style and supplying only exporting parameters, the keyword EXPORTING can be omitted

lx_error->to_fpm_error(
  EXPORTING
    iv_ref_name  = lv_field_name
    iv_ref_index = lv_row ).

Can be reduced to

lx_error->to_fpm_error(
  iv_ref_name  = lv_field_name
  iv_ref_index = lv_row ).

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