Function spl_governance::state::proposal::get_proposal_data_for_governance_and_governing_mint

pub fn get_proposal_data_for_governance_and_governing_mint(
    program_id: &Pubkey, 
    proposal_info: &AccountInfo<'_>, 
    governance: &Pubkey, 
    governing_token_mint: &Pubkey
) -> Result<Proposal, ProgramError>

Deserializes Proposal and validates it belongs to the given Governance and Governing Mint