helper function to create json for response request

creates a json output from the inputs

create_request_body(imagePaths, feature, maxNumResults)

Arguments

imagePaths	character, file paths, URLs or Cloud Storage URIs of the images, can be a combination of all three
feature	character, one out of: "LABEL_DETECTION", "FACE_DETECTION", "TEXT_DETECTION", "DOCUMENT_TEXT_DETECTION", "LOGO_DETECTION", "LANDMARK_DETECTION"
maxNumResults	integer, the maximum number of results (per image) to be returned.

Value

request body (payload), encoded as json