/**
 *
 * returns the Euler-angles of the rotation matrix \c *this using the convention defined by the triplet (`a0`,`a1`,`a2`)
 *
 * Each of the three parameters `a0`, `a1`, `a2` represents the respective rotation axis as an integer in {0,1,2}.
 * For instance, in:
 * ```
 * Vector3f ea = mat.eulerAngles(2, 0, 2);
 * ```
 * "2" represents the z axis and "0" the x axis, etc. The returned angles are such that
 * we have the following equality:
 * ```
 * mat == AngleAxisf(ea[0], Vector3f::UnitZ())
 *      * AngleAxisf(ea[1], Vector3f::UnitX())
 *      * AngleAxisf(ea[2], Vector3f::UnitZ());
 * ```
 * This corresponds to the right-multiply conventions (with right hand side frames).
 *
 * The returned angles are in the ranges [0:pi]x[-pi:pi]x[-pi:pi].

 * NOTE: ported from Eigen C++ library
 *
 * @see https://gitlab.com/libeigen/eigen/-/blob/master/Eigen/src/Geometry/EulerAngles.h
 * @see https://stackoverflow.com/questions/11514063/extract-yaw-pitch-and-roll-from-a-rotationmatrix
 *
 * @param {number[]} output
 * @param {number[]|Float32Array|mat4} m4 source matrix to extract rotation from
 * @param {number} a0 axis index (0 = X, 1 = Y, 2 = Z)
 * @param {number} a1 axis index
 * @param {number} a2 axis index
 */
export function eulerAnglesFromMatrix(output: number[], m4: number[] | Float32Array | mat4, a0: number, a1: number, a2: number): void;
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