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Write a method named matrixSum that accepts as parameters two 2D arrays of integers, treats the arrays as 2D matrices and adds them, returning the result. The sum of two matrices A and B is a matrix C where for every row i and column j, Cij = Aij + Bij. For example, if A is {{1, 2, 3}, {4, 4, 4}} and B is {{5, 5, 6}, {0, -1, 2}}, the call of matrixSum(a, b) should return {{6, 7, 9}, {4, 3, 6}}. You may assume that the arrays passed as parameters have the same dimensions.

Method: Write a Java method as described, not a complete program or class.

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