Member variable TBColumn():heading Foundation

Defines the header lines of a column.

Attribute: EXPORTED
Data type: Character | NIL

A character expression can optionally be assigned to this instance variable. It defines the header line of the column which is displayed by a TBColumn object. A header line is displayed in multiple lines when a semicolon is contained in the character expression (line break character). The character expression for the instance variable :heading can be passed to the class method :new(). If not passed, :heading is NIL.


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