h5is* tests
- h5isArray — Check if the HDF5 object is an array
- h5isAttr — Check if the HDF5 object is an attribute
- h5isCompound — Check if the HDF5 object is a compound object
- h5isFile — Check if the HDF5 object is a file
- h5isGroup — Check if the HDF5 object is a group
- h5isRef — Check if the HDF5 object is a reference object
- h5isSet — Check if the HDF5 object is a dataset
- h5isSpace — Check if the HDF5 object is a dataspace
- h5isType — Check if the HDF5 object is a type
- h5isVlen — Check if the HDF5 object is a variable length array