Function specialize_batch 

pub fn specialize_batch(
    expr: &TLExpr,
    binding_sets: &[Vec<(String, f64)>],
    config: &PEConfig,
) -> Vec<PEResult>

Multi-point specialization: evaluate expr at multiple binding sets and return one PEResult per binding set, in the same order as binding_sets.

This can be used, for example, to compile a parameterised expression for a batch of concrete parameter values.