RAII based FlatBufferBuilder pool.
Global pool:
use flatbuffers_pool::FlatBufferBuilderPool;
let mut b = FlatBufferBuilderPool::get();
let name = b.create_string("something fun");
b.finish(name, None);
Local pool:
use flatbuffers_pool::FlatBufferBuilderPool;
let mut pool = FlatBufferBuilderPool::new().build();
let mut b = pool.get();
let name = b.create_string("something fun");
b.finish(name, None);