| targetGuid | The GUID of the target, such as the one returned by GetUnityFrameworkTargetGuid. |
| name | The name of the phase. |
| dstPath | The destination path. |
| subfolderSpec | The "subfolder spec". The following usages are known: "10" for embedding frameworks; "13" for embedding app extension content; "16" for embedding watch content. |
string Returns the GUID of the matching phase or null if it does not exist.
Returns the GUID of matching copy files build phase for the given target.
The parameters of existing copy files build phase are matched to the arguments of this function and the GUID of the phase is returned only if a matching build phase is found.