class_docstr: A callable for converting CSS declarations to ExcelWriter styles
  
  Supports parts of CSS 2.2, with minimal CSS 3.0 support (e.g. text-shadow),
  focusing on font styling, backgrounds, borders and alignment.
  
  Operates by first computing CSS styles in a fairly generic
  way (see :meth:`compute_css`) then determining Excel style
  properties from CSS properties (see :meth:`build_xlstyle`).
  
  Parameters
  ----------
  inherited : str, optional
      CSS declarations understood to be the containing scope for the
      CSS processed by :meth:`__call__`.
code: def build_alignment(self, props):
      # TODO: text-indent, padding-left -> alignment.indent
      return {
          "horizontal": props.get("text-align"),
          "vertical": self.VERTICAL_MAP.get(
              props.get("vertical-align")
          ),
          "wrap_text": (
              None
              if props.get("white-space") is None
              else props["white-space"]
              not in ("nowrap", "pre", "pre-line")
          ),
      }
  
imports: import itertools
  import re
  import warnings
  import numpy
  from pandas.compat import reduce
  from pandas.core.dtypes import missing
  from pandas.core.dtypes.common import is_float, is_scalar
  from pandas.core.dtypes.generic import ABCMultiIndex, ABCPeriodIndex
  from pandas import Index
  import pandas.core.common
  from pandas.io.formats.css import CSSResolver, CSSWarning
  from pandas.io.formats.format import get_level_lengths
  from pandas.io.formats.printing import pprint_thing
label_desc: Use image node_id 4 for calling the CSSToExcelConverter obj's underlying member method code with example usage: obj.build_alignment(props) and returns: dict