Return the ``<c:ptCount>`` and sequence of ``<c:pt>`` elements corresponding to *values* as a single unicode text string. `c:

Remove any `c:tx[c:rich]` child, or do nothing if not present.

Serialize *element* to human-readable XML suitable for tests. No XML declaration.

Return the integer index of *series* in this sequence.

Set spacing to `value` lines, e.g. 1.75 lines. A ./a:spcPts child is removed if present.

SHA1 hash digest of the image blob.

split string *s* into list of strings no longer than *length*

Return the absolute path to test file having *name*.

Return bytes of file at path formed by adding `segments` to test file dir.

Note that int values are accepted.

The Excel worksheet reference to the X values for *series* (not including the column label).

The Excel worksheet reference to the Y values for *series* (not including the column label).