Macro instantiate_primitive 

macro_rules! instantiate_primitive {
    ($v:expr, $nullable:expr, $t:ty, $data_type:ident) => { ... };
}

instantiates a PrimitiveGroupValueBuilder and pushes it into $v

Arguments: $v: the vector to push the new builder into $nullable: whether the input can contains nulls $t: the primitive type of the builder