Segment with fixed length

Hello, thanks for this great and very useful library.
I was able to successfully read the eancom d.96a standard with variable length data fields separated by specific characters (as defined in the UNA segment, for example ": +" etc.).
But now I should read a file with fixed-length fields and no separator characters. In other words "every piece of data" starts at fixed specific position. Spaces are used to fill slot data.
I did not understand if it is possible with this library and if so how I should configure the classes of the segments.
Here is an example, where I replaced the spaces with points for a more comfortable reading (BGM segment)
BGM12393624178........................ZZ................05107350847........................ZZ................ORDERS2263113574201......................20201230..........220
Link to pdf for this standard (in italian, see page 8 for BGM segment)
https://gs1it.org/content/public/90/38/9038d190-dac5-46c6-9a90-906142bdb307/manuale_euritmo_ordine_gs1_italy.pdf

Tanks you in advance and good job

The issue names no source files, tests, or entry points. First determine whether fixed-length, space-padded fields are supported by the segment parsing configuration; done would require a clearly defined implementation or configuration path for the supplied BGM format, together with tests for that format.

Written by the indexing model from the issue text.