How to use the @pixi/constants.BLEND_MODES.SRC_IN function in @pixi/constants

array[BLEND_MODES.SOFT_LIGHT] = [gl.ONE, gl.ONE_MINUS_SRC_ALPHA];
    array[BLEND_MODES.DIFFERENCE] = [gl.ONE, gl.ONE_MINUS_SRC_ALPHA];
    array[BLEND_MODES.EXCLUSION] = [gl.ONE, gl.ONE_MINUS_SRC_ALPHA];
    array[BLEND_MODES.HUE] = [gl.ONE, gl.ONE_MINUS_SRC_ALPHA];
    array[BLEND_MODES.SATURATION] = [gl.ONE, gl.ONE_MINUS_SRC_ALPHA];
    array[BLEND_MODES.COLOR] = [gl.ONE, gl.ONE_MINUS_SRC_ALPHA];
    array[BLEND_MODES.LUMINOSITY] = [gl.ONE, gl.ONE_MINUS_SRC_ALPHA];
    array[BLEND_MODES.NONE] = [0, 0];

    // not-premultiplied blend modes
    array[BLEND_MODES.NORMAL_NPM] = [gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA, gl.ONE, gl.ONE_MINUS_SRC_ALPHA];
    array[BLEND_MODES.ADD_NPM] = [gl.SRC_ALPHA, gl.ONE, gl.ONE, gl.ONE];
    array[BLEND_MODES.SCREEN_NPM] = [gl.SRC_ALPHA, gl.ONE_MINUS_SRC_COLOR, gl.ONE, gl.ONE_MINUS_SRC_ALPHA];

    // composite operations
    array[BLEND_MODES.SRC_IN] = [gl.DST_ALPHA, gl.ZERO];
    array[BLEND_MODES.SRC_OUT] = [gl.ONE_MINUS_DST_ALPHA, gl.ZERO];
    array[BLEND_MODES.SRC_ATOP] = [gl.DST_ALPHA, gl.ONE_MINUS_SRC_ALPHA];
    array[BLEND_MODES.DST_OVER] = [gl.ONE_MINUS_DST_ALPHA, gl.ONE];
    array[BLEND_MODES.DST_IN] = [gl.ZERO, gl.SRC_ALPHA];
    array[BLEND_MODES.DST_OUT] = [gl.ZERO, gl.ONE_MINUS_SRC_ALPHA];
    array[BLEND_MODES.DST_ATOP] = [gl.ONE_MINUS_DST_ALPHA, gl.SRC_ALPHA];
    array[BLEND_MODES.XOR] = [gl.ONE_MINUS_DST_ALPHA, gl.ONE_MINUS_SRC_ALPHA];

    // SUBTRACT from flash
    array[BLEND_MODES.SUBTRACT] = [gl.ONE, gl.ONE, gl.ONE, gl.ONE, gl.FUNC_REVERSE_SUBTRACT, gl.FUNC_ADD];

    return array;
}

array[BLEND_MODES.HARD_LIGHT] = 'source-over';
        array[BLEND_MODES.SOFT_LIGHT] = 'source-over';
        array[BLEND_MODES.DIFFERENCE] = 'source-over';
        array[BLEND_MODES.EXCLUSION] = 'source-over';
        array[BLEND_MODES.HUE] = 'source-over';
        array[BLEND_MODES.SATURATION] = 'source-over';
        array[BLEND_MODES.COLOR] = 'source-over';
        array[BLEND_MODES.LUMINOSITY] = 'source-over';
    }
    // not-premultiplied, only for webgl
    array[BLEND_MODES.NORMAL_NPM] = array[BLEND_MODES.NORMAL];
    array[BLEND_MODES.ADD_NPM] = array[BLEND_MODES.ADD];
    array[BLEND_MODES.SCREEN_NPM] = array[BLEND_MODES.SCREEN];

    // composite operations
    array[BLEND_MODES.SRC_IN] = 'source-in';
    array[BLEND_MODES.SRC_OUT] = 'source-out';
    array[BLEND_MODES.SRC_ATOP] = 'source-atop';
    array[BLEND_MODES.DST_OVER] = 'destination-over';
    array[BLEND_MODES.DST_IN] = 'destination-in';
    array[BLEND_MODES.DST_OUT] = 'destination-out';
    array[BLEND_MODES.DST_ATOP] = 'destination-atop';
    array[BLEND_MODES.XOR] = 'xor';

    // SUBTRACT from flash, does not exist in canvas
    array[BLEND_MODES.SUBTRACT] = 'source-over';

    return array;
}

setBlendMode(blendMode, readyForOuterBlend)
    {
        const outerBlend = blendMode === BLEND_MODES.SRC_IN
            || blendMode === BLEND_MODES.SRC_OUT
            || blendMode === BLEND_MODES.DST_IN
            || blendMode === BLEND_MODES.DST_ATOP;

        if (!readyForOuterBlend && outerBlend)
        {
            blendMode = BLEND_MODES.NORMAL;
        }

        if (this._activeBlendMode === blendMode)
        {
            return;
        }

        this._activeBlendMode = blendMode;
        this._outerBlend = outerBlend;