Function read_equity_option 

pub(crate) fn read_equity_option<'a, 'd>(
    option: El<'a, 'd>,
    ctx: &Context<'_>,
) -> Result<Read<'a, 'd>, FpmlError>

Reads a European equityOption on one share or index: the option on the stated number of options times the entitlement, sold where we sell, its premium a fee.