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            /**
 * CustomQueryBuilder implements the Builder Pattern with Fluent Interface for constructing
 * complex database queries in a readable and chainable manner.
 * 
 * This class provides a fluent API that allows method chaining to build queries step by step,
 * making the code more readable and maintainable. It follows the builder pattern where each
 * method returns the builder instance to enable continuous method chaining.
 * 
 * Usage Pattern:
 * CustomQueryBuilder.Create(source)
 *     .Init(query)
 *     .SearchFilter(searchTerm, columns)
 *     .CustomSorting(sortField, sortOrder)
 *     .Build();
 * 
 * Key Features:
 * - Fluent Interface: All configuration methods return 'this' for method chaining
 * - Builder Pattern: Constructs complex queries through a series of method calls
 * - Immutable Building: Each method adds configuration without breaking the chain
 * - Terminal Operations: Final methods like Build() return the constructed query
 * 
 * Method Summaries:
 * 
 * Create(IQueryable<Object> source)
 * - Static factory method that initializes a new builder instance
 * - Sets the base query source and returns builder for chaining
 * - Entry point for the fluent interface
 * 
 * Init(IQueryable<Object> source)
 * - Initializes or reinitializes the query source
 * - Returns builder instance for method chaining
 * - Optional if Create() already set the source
 * 
 * SearchFilter(String search, List<String> columns)
 * - Applies search filtering logic to the query
 * - Filters results based on search term across specified columns
 * - Returns builder instance for continued chaining
 * 
 * CustomSorting(String sort, String order)
 * - Applies sorting logic to the query
 * - Sorts results by specified field in given order (ASC/DESC)
 * - Returns builder instance for continued chaining
 * 
 * Build()
 * - Terminal method that returns the final constructed query
 * - Completes the building process and provides the IQueryable result
 * - Should be called at the end of the method chain
 * 
 * GetQuery()
 * - Alternative terminal method to retrieve the constructed query
 * - Similar to Build() but may include additional processing
 * - Returns the final IQueryable object for execution
 */
        