Function eq_ind_partial_eval_in 

pub fn eq_ind_partial_eval_in<Cube: Hypercube, A: Allocator, P: PackedField>(
    alloc: &A,
    point: &[P::Scalar],
) -> FieldVec<P, A>

Builds the equality indicator expansion of a point into a buffer drawn from an allocator.

Backed by a pool, the result is a recyclable buffer rather than a fresh allocation.