List source dlls (metadata section in json file) in external file

**DocFX Version Used**: 2.40.7

**Template used**: default

**Problem statement**:

We use dlls as input for generating metadata. We only consider dlls that are part of our public platform API. This set of dlls changes over time. For better maintainability, we want to separate the dynamic part and the static part of the docfx.json file. That means, we would like to create a separate configuration file that lists all the dlls to be considered and we would like to reference this file within the docfx.json file (see Example below). **Is there any way to do so?**

_Example for Docfx.json File_

```
{
"metadata": [
{
"src": [
{
separateConfigurationFile.json
}
],
"dest": "api",
"disableGitFeatures": false,
"disableDefaultFilter": false
}
],

```

_Example for separateConfigurationFile.json File_

```
{
"src": "../../",
"files": [
"first.dll",
"second.dll",
"third.dll"
]
}
```