text: import { Matrix4 } from 'three'
  
  /**
   * Helper for smoothing out the `m.getInverse(x)` --> `m.copy(x).invert()` conversion
   * that happened in ThreeJS r123.
   * @param {Matrix4} srcMatrix
   * @param {Matrix4} [tgtMatrix]
   */
  export function invertMatrix4(srcMatrix, tgtMatrix = new Matrix4()) {
    if (typeof tgtMatrix.invert === 'function') {
      tgtMatrix.copy(srcMatrix).invert()
    } else {
      tgtMatrix.getInverse(srcMatrix)
    }
    return tgtMatrix
  }
  