langchain.js
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    ChromaLibArgs:
        | { url?: string } & SharedChromaLibArgs
        | { index?: ChromaClientT } & SharedChromaLibArgs

    Defines the arguments that can be passed to the Chroma class constructor. It can either contain a url for the Chroma database, the number of dimensions for the vectors (numDimensions), a collectionName for the collection to be used in the database, and a filter object; or it can contain an index which is an instance of ChromaClientT, along with the numDimensions, collectionName, and filter.