Extract common generator method from FixLongitudinalSectionGenerator The extracted methods and code can be reused for generating charts for bed differences if fixanalysis data is loaded via the datacache.

SYMBOLSET
SYMBOL
  NAME 'point'
  TYPE ELLIPSE
  POINTS
    1 1
  END
  FILLED TRUE
END
SYMBOL
  NAME "square"
  TYPE VECTOR
  POINTS
    0 0
    0 1
    1 1
    1 0
    0 0
  END
  FILLED TRUE
END
END