Function spl_governance::state::proposal_instruction::get_proposal_instruction_data_for_proposal

pub fn get_proposal_instruction_data_for_proposal(
    program_id: &Pubkey, 
    proposal_instruction_info: &AccountInfo<'_>, 
    proposal: &Pubkey
) -> Result<ProposalInstruction, ProgramError>

Deserializes and returns ProposalInstruction account and checks it belongs to the given Proposal