Constant massa_models::config::constants::MAX_OPERATIONS_COUNT_PREFIX_SIZE

pub const MAX_OPERATIONS_COUNT_PREFIX_SIZE: usize = _; // 5usize

Maximum size in bytes of the varint prefix holding the number of operations of a serialized operation list. That count is a u32 varint, and a varint carries 7 bits of payload per byte, hence ceil(32 / 7) = 5 bytes at most.