class ZCL_EXCEL_GRAPH_PIE definition public inheriting from ZCL_EXCEL_GRAPH final create public . public section. *"* public components of class ZCL_EXCEL_GRAPH_PIE *"* do not include other source files here!!! protected section. *"* protected components of class ZCL_EXCEL_GRAPH_PIE *"* do not include other source files here!!! private section. *"* private components of class ZCL_EXCEL_GRAPH_PIE *"* do not include other source files here!!! *"* use this source file for the definition and implementation of *"* local helper classes, interface definitions and type *"* declarations *"* use this source file for any type of declarations (class *"* definitions, interfaces or type declarations) you need for *"* components in the private section *"* use this source file for any macro definitions you need *"* in the implementation part of the class