StakeProgram.initialize constructor
      
      StakeProgram.initialize({ 
    
- required StakeInitializeLayout layout,
- required SolAddress stakePubkey,
Generate an Initialize instruction to add to a Stake Create transactio
Implementation
factory StakeProgram.initialize(
    {required StakeInitializeLayout layout,
    required SolAddress stakePubkey}) {
  return StakeProgram(
      layout: layout,
      keys: [
        stakePubkey.toWritable(),
        SystemProgramConst.sysvarRentPubkey.toReadOnly(),
      ],
      programId: StakeProgramConst.programId);
}