Understanding the Singleton Design Pattern – Blog
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Singleton design pattern – A simple yet useful example | SAP Blogs
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ABAP Objects Design Patterns Singleton Usage | ABAP Help Blog
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ABAP Class using Singleton pattern – used in WDA Enhancements. | SAP Blogs
Singleton design pattern – A simple yet useful example | SAP Blogs
Understanding the Singleton Design Pattern – Blog
ABAP Object Design Patterns - Singleton - ABAP Help Blog
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Design patterns in Object oriented programming – Sapignite
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Singleton design pattern – A simple yet useful example | SAP Blogs
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Class diagram
Singleton design pattern – A simple yet useful example | SAP Blogs
