https://github.com/Terracotta-OSS/offheap-store/: A library that offers data structures allocated off the java heap. 
public interface org.terracotta.offheapstore.buffersource.BufferSource
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: org.terracotta.offheapstore.buffersource.BufferSource
  super_class: java.lang.Object
{
  public abstract java.nio.ByteBuffer allocateBuffer(int);
    descriptor: (I)Ljava/nio/ByteBuffer;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
      Name  Flags
      size  
}
SourceFile: "BufferSource.java"