Why did Hansberry title the play “ a raisin in the sun”

The play's title is taken from “Harlem,” a poem by Langston Hughes, which examines the question “What happens to a dream deferred?/Does it dry up/like a raisin in the sun?” This penetrating psychological study of a working-class black family on the south side of Chicago in the late 1940s reflected Hansberry's

Explanation:

she could put on music that makes her sleep