public static Vector3f[] getSphericalHarmonicsCoefficents(TextureCubeMap cubeMap) {
        return getSphericalHarmonicsCoefficents(cubeMap, FixSeamsMethod.Wrap);
    }
same as
{@link #getSphericalHarmonicsCoefficents(com.jme3.texture.TextureCubeMap, com.jme3.environment.util.EnvMapUtils.FixSeamsMethod)}
the fix method used is {@link FixSeamsMethod#Wrap}

@param cubeMap the environment cube map to compute SH for
@return an array of 9 vectors representing the coefficients for each
RGB channel
jme3-core/src/main/java/com/jme3/environment/util/EnvMapUtils.java