LAZY:
Image is loaded into memory the first time it's requested. Specified path must exist at the time of loading.
LAZY_WITH_COPY:
Image is loaded into memory the first time it's requested. Specified path is copied into internal directory and so isn't required to exist at the time of loading.
Image Ref Path Load Mode.
EAGER: Image is immediately loaded into memory.LAZY: Image is loaded into memory the first time it's requested. Specified path must exist at the time of loading.LAZY_WITH_COPY: Image is loaded into memory the first time it's requested. Specified path is copied into internal directory and so isn't required to exist at the time of loading.