In a package, I see a lot of ‘SVector’. It looks like a datatype. But I cannot find it by help. help?> SVector search: DenseVector SparseVector AbstractVector StridedVector AbstractSparseVector DenseVecOrMat Couldn't find SVector Perhaps you meant Vector, BitVector or Schur No documentation foun…

this type is defined in StaticArrays.jl it is not standard library but it may as well be, this type is very very popular to use.