Creates a new #GBytes which references the data mapped from @file. The mapped contents of the file must not be modified after creating this bytes object, because a #GBytes should be immutable.
A newly allocated #GBytes referencing data from @file
2.34
See Implementation
Creates a new #GBytes which references the data mapped from @file. The mapped contents of the file must not be modified after creating this bytes object, because a #GBytes should be immutable.