getInstrumentationNameFromModuleName(moduleName) {
    // XXX When updating these special cases, also update `uninstrumented`.
    // To allow for instrumenting both 'pg' and 'pg.js'.
    if (moduleName === 'pg.js') {
      moduleName = 'pg'
    }

    if (isAbsolutePath(moduleName) === true) {
      // moduleName is an absolute path to a module. So we need to look up
      // the simple name from the registered instrumentations.
      return this.registeredInstrumentations.simpleNameFromPath(moduleName)
    }

    return moduleName
  }
Given a NodeJS module name, return the name/identifier of our
instrumentation.  These two things are usually, but not always,
the same.

@param {string} moduleName name of module getting instrumented
@returns {string} name unless pg.js and then returns pg