Generates an attributed label for the specified series, or null if no attributed label is available (in which case, the string returned by PieSectionLabelGenerator will provide the fallback). Only certain attributes are recognised by the code that ultimately displays the labels:

• TextAttribute#FONT: will set the font;
• TextAttribute#POSTURE: a value of TextAttribute#POSTURE_OBLIQUE will add Font#ITALIC to the current font;
• TextAttribute#WEIGHT: a value of TextAttribute#WEIGHT_BOLD will add Font#BOLD to the current font;
• TextAttribute#FOREGROUND: this will set the Paint for the current
• TextAttribute#SUPERSCRIPT: the values TextAttribute#SUPERSCRIPT_SUB and TextAttribute#SUPERSCRIPT_SUPER are recognised.

Parameters: dataset the dataset. key the key.

Returns: An attributed label (possibly null).

Generates a label for a pie section.

Parameters: dataset the dataset (null not permitted). key the section key (null not permitted).

Returns: The label (possibly null).