docs: public static final float findFloat(CharSequence cs, int beginIndex, int endIndex)
      {
          int begin = CharSequences.indexOf(cs, Primitives::isFloatDigit, beginIndex);
          int end = CharSequences.indexOf(cs, (c)->!Primitives.isFloatDigit(c), begin);
          return parseFloat(cs, begin, endIndex(end, endIndex));
      }